The Dirty Secrets Club by Meg Gardiner

Jo Beckett is a forensic psychiatrist who works with the San Francisco Police Department performing psychological autopsies in cases where the cause of death is not clear. When successful prosecutor Callie Harding drives her BMW off an overpass, the cops aren't sure if it's suicide or murder. Her passenger, Geli Meyer, is seriously injured and isn't talking. Jo begins to delve into Callie's personal life, along with inside information from the police that her "accident" might be connected to some other high profile deaths in the past few weeks. It's a race against time as Lt. Amy Tang from the SFPD tells Jo that they have 48 hours until another person dies.... The Dirty Secrets Club is a fast-paced story with a strong female main character who has scars of her own. It also has touches of humor mixed in with a few graphic scenes. A good summer read that will be published in mid-June.