A brand new adventure from the world of The 39 Clues!For 500 years, the Cahills have been the most powerful family in the world. For 500 years, they've protected the source of their power - the 39 Clues. And for 500 years, they've kep...

DIVp style="MARGIN-LEFT: 0.5in" class="MsoNormal"i"There are only two reasons a non-seer would see a spirit on St. Mark's Eve," Neeve said. "Either you're his true love . . . or you killed him.&qu...