This book is part of a book series called First Facts-Unexplained Mysteries .

This book has been graded for interest at 6-9 years.

There are 24 pages in this book. This book was published 2013 by Capstone Press .

Michael Burgan has written more than two dozen biographies for young readers. His Breaker Boys , about photographer Lewis Hine and his depiction of child labor, was named one of SLJ 's 20 Outstanding Nonfiction Books of 2013 .