When Gregor follows his little sister through a grate in the laundry room of their apartment building, he hurtles into the dark Underland beneath the city. There, humans live uneasily beside giant spiders, bats, cockroaches, and rats—but the fragile peace is about to fall apart. Gregor wants no part of a conflict between these creepy creatures. But when he discovers that a strange prophecy foretells a role for him in the Underland, he realizes it might be the only way to solve the biggest mystery of his life. This unforgettable novel by Suzanne Collins, the international bestselling author of the Hunger Games series, is rich in suspense and brimming with adventure