Most Popular Books by Natalie Pope Boyce

Read the adventure and track the facts—it''s two great ebooks in one! Join Jack and Annie as they travel back to the first Thanksgiving in Magic Tree House® #27: Thanksgiving on Thursday. Then uncover the facts behind the fiction in Magic Tree House® Fact Tracker: Pilgrims. It’s two favorite ebooks in one! Find out why Mary Pope Osborne’s #1 New York Times bestselling series is such a hit with kids, parents, and teachers around the world.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie came back from their adventure in Magic Tree House #5: Night of the Ninjas, they had lots of questions. What did it mean to be a ninja or a samurai? Did they really have special abilities? What was life like for them in ancient Japan? Find out the answers to these questions and more as Jack and Annie track the facts behind some of history’s most intriguing and secretive figures. Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

Track the facts about the Alamo, the Galveston hurricane, and the great state of Texas! When Jack and Annie came back from their adventure in Magic Tree House #30: Hurricane Heroes in Texas, they had lots of questions. Why is Texas called the Lone Star State? What was the Alamo? When was the Galveston hurricane? Why was it so terrible? Find out the answers to these questions and more as Jack and Annie track the facts about Texas. Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures. Did you know that there''s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures

Learn the true story of Thanksgiving with the #1 bestselling chapter book series of all time, Magic Tree House! Track the facts with Jack and Annie in this nonfiction companion to Magic Tree House #27: Thanksgiving on Thursday! When Jack and Annie got back from their adventure in Magic Tree House #27: Thanksgiving on Thursday, they had lots of questions. What was it like to sail on the Mayflower? Why did the Pilgrims choose Plymouth? How did they survive in their new home? What did they really eat at the first Thanksgiving? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there''s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

Read the adventure and track the facts—it''s two great ebooks in one! Join Jack and Annie as they travel to Mexico City for the 1970 World Cup in Magic Tree House® #52: Soccer on Sunday. Then uncover the facts behind the fiction in Magic Tree House® Fact Tracker: Soccer. It’s two favorite ebooks in one! Find out why Mary Pope Osborne’s #1 New York Times bestselling series is such a hit with kids, parents, and teachers around the world.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! When Jack and Annie got back from their adventure in Magic Tree House #28: High Tide in Hawaii, they had lots of questions. What causes tsunamis? Who studies earthquakes? How do volcanoes form? What should people do if an avalanche hits? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

Read the adventure and track the facts—it''s two great ebooks in one! Join Jack and Annie as they travel to ancient Greece to meet Alexander the Great and his famous horse in Magic Tree House® #49: Stallion by Starlight. Then uncover the facts behind the fiction in Magic Tree House® Fact Tracker: Horse Heroes. It’s two favorite ebooks in one! Find out why Mary Pope Osborne’s #1 New York Times bestselling series is such a hit with kids, parents, and teachers around the world.

Now in paperback with an all-new chapter on how to survive a pandemic! Learn to survive anything--just like Jack and Annie! This kid-friendly guide is based on the #1 New York Times bestselling series. Jack and Annie have survived all kinds of dangers on their adventures in the magic tree house. Now they''re sharing their secrets with you! Find out how you can tackle lots of scary situations, including shark encounters, earthquakes, fires, shipwrecks, pandemics, and many more! With full-color photographs and illustrations, facts about real-life survival stories, and tips from Jack and Annie, this is a must-have for all survivors of the bestselling Magic Tree House series.

An activity book full of more than 200 animal puzzles, games, and activities for kids who love the #1 bestselling Magic Tree House books! Take a walk on the wild side with Magic Tree House® animal activities! From cobras to koalas to emperor penguins, Jack and Annie have met all kinds of animals on their adventures. Now you can test your animal awareness and Magic Tree House® mastery with this flock of fantastic activities. Includes Tic-Cat-Toe, A Perfect Time for Riddles, Marsupial Maze, Crazy Critter Charades, Which Animal Are You?, and much more. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #16: A Ghost Tale for Christmas Time, they had lots of questions. Why did Charles Dickens write A Christmas Carol? How did he help the poor? What jobs did poor Victorian kids have? How did rich kids spend their time? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House #7: Sunset of the Sabertooth, they had lots of questions. What was it like to live in the Ice Age? How did early humans stay warm enough to survive? Who made the first cave paintings? What happened to saber-toothed cats and woolly mammoths? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

" ... series was formerly known as the Magic Tree House research guide series"--T.p. verso.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie! When Jack and Annie got back from their adventure in Magic Tree House #22: Revolutionary War on Wednesday, they had lots of questions. What was it like to live in colonial times? Why did the stamp Act make the colonists so angry? Who were the Minutemen? What happened at the Boston Tea Party? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie! When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #15: Leprechaun in Late Winter, they had lots of questions. What are leprechauns? How do we know many of the old Irish stories? How do fairies spend their time? Who speaks the Irish language? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #21: Stallion at Starlight, they had lots of questions. Why did people tame horses? What jobs do horses have today? Why was Alexander the Great''s horse so famous? What are some other famous horses in history? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie! When Jack and Annie got back from their adventure in Magic Tree House #9: Dolphins at Daybreak, they had lots of questions. Did dolphins ever live on land? How do dolphins communicate? How do sharks hunt for food? Which sharks are the most dangerous? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House #16: Polar Bears Past Bedtime, they had lots of questions. Why is the Arctic so cold? What did the first people of the Artic eat? How do polar bears cross thin ice? What other animals live in the Arctic? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #23: High Time for Heroes, they had lots of questions. How did Florence Nightingale change nursing? Who helped women get the vote? What was Martin Luther King, Jr.''s, dream? How did Gandhi change the world? Find out the answers to these questions and more as Jack and Annie track the facts behind six amazing people who have changed history. Includes Florence Nightingale, Martin Luther King, Jr., Gandhi, Harriet Tubman, Susan B. Anthony, and John Muir. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House #13: Vacation Under the Volcano, they had lots of questions. How did ancient Rome become an emipre? Where did ancient Romans go for fun? What happened to the Roman town of Pompeii? What have we learned from it? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House #16: Hour of the Olympics, they had lots of questions. What did the ancient Greeks wear? What did they do for fun? Where were the very first Olympics held? How are our modern Olympics similar to the ancient Olympics? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

Presents a non-fiction companion to the book "Dogs In The Dead Of Night," discussing cases where dogs have come to the rescue of people and other animals, and describes the roles of service and other working dogs.

Track the facts about baseball—with Jack and Annie! When Jack and Annie came back from their adventure in Magic Tree House #29: A Big Day for Baseball, they had lots of questions. When was baseball invented? What are the rules? Who was Jackie Robinson? Who are some other baseball greats? Find out the answers to these questions and more as Jack and Annie track the facts about America’s national pastime. Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures. And teachers can use the Fact Trackers alongside their Magic Tree House fiction companions to meet Common Core text pairing needs. Have more fun with Jack and Annie on the Magic Tree House website at MagicTreeHouse.com!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie came back from their adventure in Magic Tree House #14: Day of the Dragon King, they had lots of questions. Who was the Dragon King? How did he build the Great Wall? What is Chinese New Year? What are some other Chinese traditions? Find out the answers to these questions and more as Jack and Annie track the facts about Chinese history and culture. Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

In the next Magic Tree House® Fact Tracker, track the facts about World War II—with Jack and Annie! When Jack and Annie came back from their adventure in Magic Tree House Super Edition #1: World at War, 1944, they had lots of questions. How did World War II begin? Why were so many innocent people killed? What was D-Day? Find out the answers to these questions and more as Jack and Annie learn all about one of the darkest hours of history. Filled with up-to-date information, photographs, illustrations, and tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures. And teachers can use the Fact Trackers alongside their Magic Tree House fiction companions to meet Common Core text pairing needs. Have more fun with Jack and Annie on the Magic Tree House website at MagicTreeHouse.com! Did you know there’s a Magic Tree House book for every reader? Find the perfect book for you: Classic: Adventures with Jack and Annie, perfect for readers who are just starting to read chapter books. F&P Level M. Merlin Missions: More challenging adventures for the experienced Magic Tree House® reader. F&P Level N. Super Edition: A longer and more dangerous adventure with Jack and Annie. F&P Level P. Fact Trackers: Non-fiction companions to your favorite Magic Tree House® adventures

Track the facts about cowboys, ghost towns, outlaws, and more! When Jack and Annie came back from their adventure in Magic Tree House #10: Ghost Town at Sundown, they had lots of questions. What is a ghost town? Why do we call the Old West wild? What are cowboys? Who was Billy the Kid? Find out the answers to these questions and more as Jack and Annie track the facts about the American West. Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures. Did you know that there''s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

Read the adventure and track the facts—it''s two great ebooks in one! Join Jack and Annie as they travel to Antarctica in Magic Tree House® #40: Eve of the Emperor Penguin. Then uncover the facts behind the fiction in Magic Tree House® Fact Tracker: Penguins and Antarctica. It’s two favorite ebooks in one! Find out why Mary Pope Osborne’s #1 New York Times bestselling series is such a hit with kids, parents, and teachers around the world.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie! When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #19: Abe Lincoln at Last!, they had lots of questions. What was it like to grow up in a log cabin? How did Lincoln become president? What was his family like? Why did the US fight the Civil War? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

"This book is a research companion to the Magic Tree House story "Dark Day in the Deep Sea," providing facts about sea creatures and the history of underwater exploration. The coauthor is Natalie Pope Boyce" (publisher).