From the creator of the Land of Elyon comes a riveting adventure set in an extraordinary satellite world created as a refuge from a dying Earth that begins to collapse and forever change the lives of its inhabitants. Edgar, a gifted climber, is a lonely boy scaling the perilous cliffs that separate the three realms of Atherton: a humble fig grove; a mysterious highland world of untold beauty and sinister secrets; and a vast wasteland where he must confront an unspeakable danger that could destroy the people of Atherton. When Edgar discovers a book which contains the history of Atherton's origins and ultimate apocalypse, his world quite literally begins to turn inside out.

The second book in an epic fantasy sequence from New York Times bestselling author Patrick Carman The Highlands, the center of Atherton, is sinking; Samuel and Isabel are trying to sneak into The House of Power to restore water to the world of Atherton; and Dr. Kincaid, Vincent and Edgar make their way towards the edge of the Highlands, intent on entering the secret underground refuge of Mead's Hollow and finding the key to unlocking Dr. Harding's brain. They must discover the solution to overcoming the threat of the deadly Cleaners, creatures now unleashed on the flattened land, before it's too late. But Mead's Hollow holds more secrets than any of them had ever imagined.

In the dazzling conclusion to the epic story of Atherton, Patrick Carman takes readers on the most rewarding journey of all, to the perilous realm of The Dark Earth. When Edgar discovers a way to leave the mysterious satellite world of Atherton, he couldn't have imagined the gloom that awaited him on the dark planet, where the oceans are toxic, the forests are full of mutant monsters, and children toil in darkness, controlled by ruthless maniacs. Max Harding, an orphan of the Silo, the maker of Atherton, and the last hope of a dying world, left this place behind, and now Edgar is determined to complete the mad scientist's spectacular plan, revealing Atherton's true purpose. Edgar's quest to discover Earth's dark secret leads to an out of this world adventure in the final book of the Atherton trilogy.