Best Selling Books by Gloria Skurzynski

While standing on a mountain, Caitlin and her friend see a fireball and investigate.

When Dr. Olivia Landon receives this anonymous e-mail shortly after broadcasting her controversial plan to save the condors, everyone thinks it’s a crank threat except Dr. Landon’s daughter Ashley. She’s sure it’s the handiwork of Morgan Rogers, self-proclaimed anarchist and computer geek. Suspicions mount when the death threat almost becomes a reality, and Morgan is the only witness. Is he innocent or guilty? Journey into the maze of Morgan’s cyberworld and find out!

Grizzly cubs are disappearing from Glacier National Park, and the Landon family must figure out why! But for Jack, the real mystery is his sister Ashley''s strange behavior. What was she doing alone in the woods so early in the morning? And why did she lie to their parents? Jack''s efforts to unravel the truth lead to a pulse-pounding adventure that brings the Landon kids face to face with an enraged grizzly—as Jack and his sister suddenly become the hunted.

Jack and Ashley’s search for eight-year-old Sammy has left them hopelessly lost in a twisted maze of tunnels deep inside Carlsbad Caverns. Bats are everywhere, and the echoes of their screeching cries sends a chill through the trio. The only light is the candle in their lantern. What will happen when it burns out, leaving them in total darkness?

Jack can’t believe what he’s hearing. His sister is being held hostage. Whoever snatched Ashley must have been following the Landons as they explored Death Valley National Park. But what do they want with Leesa? When Jack discovers why Leesa is on the run, he is determined to protect her. But how can he do that and save Ashley, too? One thing he knows for sure, failure is not an option. National Geographic supports K-12 educators with ELA Common Core Resources. Visit www.natgeoed.org/commoncore for more information.

Someone is stealing the Science Club pets and Caitlin soon discovers something interesing about the thefts and a new club member.

The Landon family is Southbound—headed for Florida to investigate a mysterious illness plaguing endangered manatees in Everglades National Park. Jack, Ashley, and their friend Bridger soon find themselves in deadly waters with a seven-foot shark, an injured manatee—and a mystery to solve. Who was the stranger in the speedboat who snatched Jack''s camera? And what does he have to do with the manatees? Join the heart-stopping chase through a maze of mangrove islands to find out!

In this fast-paced adventure, the Landons trail a wounded wolf in Yellowstone National Park. The park is abuzz with rumors of a wolf attack. Meanwhile, a killer stalks the woods. Unaware of the danger, Jack and Ashley are more concerned about rebellious teenage foster child, Troy Haverson. From the opening moments at Old Faithful through 48 action-packed hours, the tension builds: What is lodged in the wolf''s radio collar? And what is the meaning of the Native American story of Sin-a-Wavi? A heady mix of suspense, adventure, and moments of tenderness lure readers into this story of kids discovering the natural world. The book''s afterword, by Yellowstone''s Michael K. Phillips, explores the park''s Wolf Restoration Program. National Geographic supports K-12 educators with ELA Common Core Resources. Visit www.natgeoed.org/commoncore for more information.

When a cougar attacks a hiker in Mesa Verde National Park, the Landons have another mystery on their hands. Jack and Ashley are used to visiting parks with their wildlife veterinarian mother and photographer father, but this time their hands are full with a foster child called Lucky Deal. As Lucky and Jack become friends, Ashley becomes suspicious: What did Lucky take from the burn site? Who did she call in the night? In a midnight showdown at Spruce Tree House, Jack realizes there''s more to fear than a killer cat. Cliff-Hanger weaves Native American folklore, natural science, and geography into a heart-pounding thriller. The afterword by Will Morris, Chief of Interpretation and Visitor Services at Mesa Verde, outlines the dangers of cougar attacks and the need to protect wild animals. National Geographic supports K-12 educators with ELA Common Core Resources. Visit www.natgeoed.org/commoncore for more information.

This thrilling series roars back to life with the release of Mystery #13, Night of the Black Bear. Something very strange is going on in Great Smoky Mountains National Park. A teenage girl is the latest victim in a growing number of bear attacks. Officials must figure out what''s causing the bizarre bear behavior or close the park. Can the Landons help? Soon Jack and Ashley are searching for answers with their new friends Yonah Firekiller, a 16-year-old Cherokee boy, and 14-year-old Merle Chapman, whose family once lived on park land. But a heated argument over ancestral land rights puts the Landon kids in the middle of a clash of cultures. Tensions mount when Merle is caught in a lie—a lie that leads straight to the heart-pounding solution. This breathtaking new adventure features an afterword by a park naturalist on black bear behavior and the problems caused by tourists feeding wildlife. Night of the Black Bear is a fast-paced narrative treat filled with vivid descriptions of the natural, scientific, and cultural phenomena of Great Smoky Mountains National Park; a page-turner that will put this popular National Park high on the vacation wish-list of all young readers. National Geographic supports K-12 educators with ELA Common Core Resources. Visit www.natgeoed.org/commoncore for more information.

Examines different kinds of electromagnetic waves, including radio waves, microwaves, light, x-rays and gamma rays.

..three, two, one... we have liftoff! From the award-winning author of Are We Alone? comes a title to propel young imaginations far into space. This Is Rocket Science explores the past, present, and future of space travel. The compelling text—vetted by NASA scientists—is a combination of history, science, human drama, and future challenges. Readers learn how fireworks in ancient China developed into the fire arrows used by Genghis Khan; we meet Sir Isaac Newton, Jules Verne, H.G. Wells, and learn how their imaginations shaped rocketry. We revisit the era of Sputnik, the satellite that launched a superpower space race, ending with moonwalks and a rendezvous in space. Finally we look forward to the future challenges of Mars and beyond. We also get a sneak peek at new technologies like space elevators, solar sails, ion propulsion, and more.

Traces the history of labor unions in the United States, including the first labor strike in Jamestown, the impact of the Great Depression on labor unions, and the challenges unions face today.

The fourth book in the exciting High-Tech World series, Know the Score explains how electronic games are created, and provides an inside look at how they work. Lavishly illustrated with full-color photos.

When he is suddenly stricken by the rare halving disease, Gustavus meets progressively smaller animals, from dogs to aphids, in his search for help.

An introduction to physical and computer simulations, focusing on the use of wind tunnels, air and automotive safety testing, astronaut training, and current and future uses of images created by computer simulation.

Reviews results from the study of Mars, from Copernicus through the Viking and Pathfinder missions, and speculates on a future human landing.

While on a three-day hike in the mountain wilderness, two thirteen-year-old brothers must use all their skill to survive when they are confronted by an injured drug dealer and are caught in an earthquake.

Grizzly cubs are disappearing from Glacier National Park, and the Landon family must figure out why!

Twelve-year-old Jack and his family go to Yellowstone National Park, where Jack''s mother, a wildlife veterinarian, is investigating the report that wolves reintroduced to the park have killed a dog there.

A brother and sister in Las Vegas are caught up in a terrorist scheme to damage the Hoover Dam.

Visiting Zion National Park with his family, twelve-year-old Jack encounters two mysteries, the strange behavior of a band of wild mustangs and the possibly sinister actions of his new foster brother, a Shoshone boy.

Martin doesn''t like coming home to an empty house when his mother goes back to work.

While taking one last driving tour of Wyoming before moving out of state, eleven-year-old Angela accompanies her beloved seventy-eight-year-old great-aunt Hil to Yellowstone National Park, where Hil''s strange behavior suggests she may be losing her sanity.

Collection contains manuscripts, editor''s comments, fan mail, copies of books, notes, correspondence, book covers, photographs, slides, research material, (including books and periodicals) and newspaper articles collected or created by Gloria Skurzynski between circa 1980 and 2006.

The inner workings of the postal system are revealed as the author traces the path of a little girl''s letter from her home in New Mexico to her cousin''s home in Utah. Includes tips on how to address an envelope.

A seven-year-old Brazilian boy catches a one-legged imp in a bottle to stop him from doing any more mischief.

Summary: The little old woman rides through the jungle in her magic pumpkin confident that she can outwit the tiger and gray wolf waiting to eat her for dinner.

Discusses the invention, function, and composition of artificial kidneys, eyes, ears, hearts, arms, legs, and other human replacement parts, and proposes some related legal and ethical problems.