Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Explains much about the characters in Wreckage

I started by reading Robotham's latest, Wreckage. His protagonist in his earlier books plays a role in Wreckage, but is not the focus. Lost explains a great deal about a flawed by likable and stubborn cop and his adviser and friend, a therapist with Parkinson's. This is tricky, adult fare which rewards the alert reader. You won't be able to see where the story is going. The only implausibility is his hero's high tolerance for pain and rapid recovery from serious injury. I am looking forward to reading his earlier books; perhaps the interested reader would be better off trying them in chronological order. The Wreckage is even better than Lost, but it helps to have the back story, even if Wreckage can stand alone as a superb thriller. This is an exciting series by a first rate writer, and a wonderful discovery.