This book is part of a book series called Underworlds .
This book has been graded for interest at 7-10 years.
This is a chapter book. Publishers market early chapter books at readers aged 6-10 years. This book was published 2016 by Scholastic US .
Tony Abbott is the author of the bestselling fantasy saga, "The Secrets of Droon. " He lives and writes in Connecticut.
This book is in the following series: