This book is part of a book series called Mysteries Files .
This book has been graded for interest at 8-11 years.
This book was published 2015 by Crabtree Publishing Company .
Tim Cooke is the author of National Geographic's Ancient Aztecs: Archaeology Unlocks the Secrets of Mexico's Past and Concise History of World Religions: An Illustrated Time Line .
This book is in the following series: