Ghost Heart (The PSS Chronicles #3‪)‬

In the aftermath of a brutal tragedy, Jason and Passion are on the run. Marcus is lost beyond reach, and The Hold is in shambles. If that weren't enough, Olivia Black has been taken by the CAMFers to be used as Dr. Fineman's personal lab rat in his merciless quest to uncover the mysteries of Psyche Sans Soma once and for all. But only if he can break her.

They are scattered.
They are devastated.
They are ruined.

Their only hope is Olivia's stubborn determination to thwart her captors and unlock the secrets of her ghost hand before Dr. Fineman can. Will she finally find the strength within herself to embrace the full power of her PSS?

And will it even matter if Marcus has already betrayed her?