A marine biology student reporting to his summer job on an island off portugal finds himself at the center of a power struggle between his boss and another group of americans.

Fourteeen-year-old Sunni, her stepbrother Dean, and an art-student friend trace the footsteps of a labyrinth built in Blackhope Tower by a mysterious and brilliant sixteenth-century artist, and suddenly find themselves trapped inside his enchanted painting, trying desperately to get out.

As members of the first crew of astralnauts, Matt Cruse and Kate De Vries journey into outer space on the Starclimber and face a series of catastrophes that threaten the survival of all on board.

On a cross-country vacation with their parents, twins Coke and Pepsi, soon to be thirteen, fend off strange assassins as they try to come to terms with their being part of a top-secret government organization known as The Genius Files.

When swan Elsinore, the beavers' beloved mother figure, is kidnapped by dark forces, Dunwattle and Locksley set out to find her, but little do they know, they have a much larger expedition in store when they discover other persecuted animals being held against their will for nefarious purposes.

When Lady Gretchen is abducted by the werelion Prince Lucas, Drew and his friends embark on a perilous chase to stop the prince from fleeing with her, but as they encounter terrifying new werelords, Drew must summon all his courage and strength to defeat the creatures.

When the Time Fetch's foragers gobble up too much time, causing the fabric of the universe to unravel and blur the boundaries between worlds and dimensions, eighth-grade loner Edward and his classmates must band together to save the day.

Plagued by the voices of Avatars before her for as long as she can remember, Yangchen travels to Bin-Er in the Earth Kingdom where she partners with an informant named Kavik and soon learns to rely on her own wisdom and continue her journey from uncertain young woman to revered leader.

"In New York Times bestselling author Dan Gutman's all-new series, which blends fascinating real history with an action-packed adventure, four very different kids are picked by a mysterious billionaire to travel through time and photograph some of history's most important events. This time, Luke, Julia, David, and Isabel are headed to the deck of the doomed Titanic. Their mission? Capture a shot of the sinking ship, then come right back. The only...

Twelve-year-old Alexa and her companions unwittingly lead Abaddon, now in the form of an enormous, horrible sea monster, to the secret community known as the Five Stone Pillars when they go to bring the people living there home.