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

Months have passed since Gregor first fell into the strange Underland beneath New York City, and he swears he will never go back. But he is destined to be a key player in another prophecy, this one about an ominous white rat called the Bane. The Underlanders know there is only one way to lure Gregor back to their world: by kidnapping his little sister, Boots. Gregor’s quest reunites him with his bat, Ares, and the rebellious princess, Luxa. They descend into the dangerous Waterway in search of the Bane, and Gregor knows what is at stake. If he does not fulfill the prophecy, his life, and the Underland, will never be the same

With two prophecies fulfilled, Gregor is now focused on the Prophecy of Blood, which calls for Gregor and “the princess,” Boots, to return to the Underland to help ward off a plague. His mom agrees to let them go—on the condition that she travels with them. When they arrive in the subterranean city, the plague is spreading—and one of Gregor’s family is stricken. Only then does he understand his role in the prophecy. He must summon all his power to end the biological warfare, or the warmblood creatures of the Underland will die

Now, with the third prophecy fulfilled Gregor is drawn into a crisis. For generations, rats have run the mice—or "nibblers"—out of whatever lands they’ve claimed, keeping them on the move. But now the mice are disappearing, and the young queen Luxa is determined to find out why. When Gregor joins her on a fact-finding mission, the true fate of the mice is revealed. It is something far more sinister than Gregor or Luxa had imagined—and it points the way to the final prophecy he has yet to fulfill. Will Gregor’s role as warrior be put to the test?

Everyone has been trying to keep Gregor from seeing The Prophecy of Time. That is because the final prophecy calls for the warrior’s death. With an army of rats quickly approaching and time running out, Gregor must defend Regalia and get his family back home safely. There is a code that must be cracked, or all will be lost. It is a war designed to end all wars. The fates of the Underland and the great warrior, Gregor the Overlander, masterfully unfold in this thrilling and suspenseful final installment in Suzanne Collins’s Underland Chronicles