This title is from "The New York Times" bestselling series. On the hunt for the 39 Clues, Amy and Dan Cahill uncovered shocking information about their past - from what happened the night their parents died to the shattering discovery about their family branch. But the biggest secret of all remains behind Grace Cahill's alternate will. Now, Amy and Dan are about to discover a long-hidden secret of the Cahils - a secret so dangerous that people died to protect it. Will this be the end of them? Or just the end of everything they think they knew?

 

This is number 9 in 39 Clues .

There are 192 pages in this book. This book was published 2010 by Scholastic US .

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?