This book is very twisty! Listening on audio, I gobbled this one up! Jessica signs up for a simple psychological study on ethics and morality, and it consumes her life. Jess grows more wary as Dr Shields grows more omnipresent in her life. What are the moral decisions that need to be made as she moves forward? Who are the players in this game. I don't often feel this way, but I might have enjoyed this one even more reading than listening because of the intense page turning pace I think I would have read it at. If you like thrillers with a heavy psychological bent, you will enjoy this one.