This book is part of a book series called Seven Wonders .

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

There are 80 pages in this book. This book was published 2011 by Twenty-First Century Books (Tm) .

Rosanna Hansen is the author of more than fifteen children's books. Before shedecidedto write full-time, she worked in children's books as a publisher and editor in chief at such companies as Weekly Reader, Reader's Digest Children's Books, and Groilier.