The first in a gripping young fantasy series from the author of THE HUNGER GAMES. When eleven-year-old Gregor falls through a grate in the laundry room of his apartment building he hurtles into the dark Underland where spiders rats and giant cockroaches coexist uneasily with humans. This world is on the brink of war and Gregors arrival is no accident. But Gregor wants no part of it - until he realizes its the only way to solve the mystery of his fathers disappearance. Reluctantly Gregor embarks on a dangerous adventure that will change both him and the Underland for ever.