This book is part of a book series called 39 Clues .

This book has been graded for interest at 8-12 years.

This book was published 2010 by Scholastic .

Linda Sue Park is the author of many books for young readers, including the Newbery Medal winner A Single Shard, and many other novels, poems and picture books. She lives in Rochester, New York, with her family, and gave a popular TED talk called Can A Children's Book Change the World?