Underland Chronicles Series

A quiet boy falls out of his laundry room into a fantastical subterranean world called the Underland. Accompanied by his toddler sister, Boots, Gregor embarks on a series of dangerous quests in order to fulfill his destiny, in a strange world beneath New York City, a world inhabited by giant talking creatures - cockroaches, bats, spiders and rats - and an unusual society of humans. And perhaps the strangest thing Gregor finds, is that they're all expecting him...