Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Family secrets

Dr. Azor Sparks, a prominent heart specialist, is found brutally murdered. Lieutenant Peter Decker is called in on the case and he discovers that the doctor fathered some very dysfunctional children who stood to benefit from their father's life insurance policy. To complicate matters, Dr. Sparks was developing a controversial new drug, and several people had a motive to disrail his research. A third complication is Dr. Sparks' unlikely association with a motorcycle gang with whom he rode on weekends. As always, Faye Kellerman weaves disparate threads into an interesting pattern and intertwines Peter Decker's professional and personal lives. In this book Peter's wife Rina has an unusual connection with one of the murder suspects and this creates some tension between the two of them. This is another winner from Faye Kellerman.