The Amanda Project: Book 4: Unraveled by Cathleen Davitt Bell

Amanda will be found only if she wants to be.

When Hal, Callie, and Nia first met Amanda Valentino, they had no idea their lives were about to change. But Zoe did. Zoe knew exactly the kind of effect Amanda would have on Endeavor High because, a long time ago and far away, Zoe and Amanda had been friends.

As Zoe and the other guides follow Amanda's trail on a wild scavenger hunt, they learn that the real reason Amanda chose them is rooted in their pasts, tied up with a sinister program their parents went through. They've each developed strange abilities as a result, but even as they master these powers, the same people who are searching for Amanda are circling closer and closer. . . .

Now it is a race against time to find Amanda—before their pursuers find them.