This book is about a boy and his sister who get sucked through a vent in an apartment's laundry room. They go to the underland, there they are met by crawlers. The people in the city believe Gregor is the warrior from the prophecy of gray and will help them defeat the rats in a war to save Regalia, the city where the people of the underland live.By Colin B

Note: This book is available in our Library.