This is volume 4 in Underworlds .

This book has been graded for interest at 7-10 years.

There are 112 pages in this book. 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. Antonio Javier Caparo has illustrated many books for children, including the Magic Thief series and The Young Reader's Shakespeare: A Midsummer Night's Dream . He lives in Montreal, Canada.