Millions of years in the Earth’s future, humans have long vanished from the planet. Evolution has produced a host of wondrous and intelligent beings: shape-shifting Fantastic Grouts with globes of light atop their skulls; creatures descended from flowers; and massive swarms of bees that can bore perfect holes through metal or bone.
But some seek a way to bring the humans back into the world—a world filled with creatures like twelve-year-old Tully, a young, amphibious Eft who imagines humans as nothing more than old bones and fairy stories. When his beloved guardian is stolen by a menacing black shadow, Tully must embark on a journey to a cruel, northern land to save her and his entire species. In an adventure that blends time travel, magic, and science, Tully learns whom he can trust, and who will betray him—for the price of reawakening the Hundred.