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 Planet: 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.