This book is part of a book series called Tor. Com Original .

This book has been graded for interest at 10-14 years.

This book was published 2014 by Starscape Books .

ALAN GRATZ is the author of many critically-acclaimed books for children and teens, including Samurai Shortstop , an ALA Top Ten Books for Young Adults; Prisoner B-3087 ; The Brooklyn Nine ; Refugee ; and the League of Seven trilogy ( The League of Seven , The Dragon Lantern , The Monster War ). A native of Knoxville, Tennessee, Alan is now a full-time writer living in western North Carolina with his wife and daughter.