This book is part of a book series called Unexplained Phenomena .

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

There are 48 pages in this book. This book was published 2010 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 .