The Clinic (Alex Delaware #11) by Jonathan Kellerman

She was found stabbed to death on a quiet, shady street in one of L.A.'s safest neighborhoods. For three months the police have found no clues to the murder of Hope Devane, psychology professor and controversial author of a pop-psych bestseller, an angry indictment of men.

Now Detective Milo Sturgis, newly assigned to the case, turns to his psychologist friend, Dr. Alex Delaware, looking for insights into Devane's life.