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?