Title of Book or Name of Activity
39 Clues: Doublecross - book 1, by
This book is the latest of many in the series so a lot of things might spoil it. This book is about Amy Cahill, Dan Cahill, Ian Kabra, Hamilton Holt, and Cara Pierce. It is about them having to do whatever the Outcast says or else innocent people will die. They also have to find out who the Outcast is. The 39 Clues is my favorite series and think anyone who likes mysteries will probably like it.
This book ends on a little bit of a cliffhanger.