Eleven-year-old Gregor and his younger sister, Boots, return to the Underworld beneath New York City to find the cure for a terrible plague that threatens the life of their mother, as well as the lives of the people, bats, and rats who populate the underworld.

In his second adventure, eleven-year-old Gregor returns to the world beneath New York City to rescue his kidnapped sister, Boots, and fulfill a prophecy that will restore peace to the people, bats, rats, cockroaches, and spiders who populate the underworld.

Read all five books in the New York Times bestselling Gregor: The Underland Chronicles!

When Gregor follows his little sister through a grate in the laundry room of their New York 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 in this conflict, but again and again, he...