Good to the Last Kiss (Crimes of the Depraved Mind)

An Inspector Vincent Gratelli mystery - San Francisco Inspector Vincent Gratelli is charged with finding the killer of young women - all murdered in the same way, all left with an intimate mark. The most recent victim was beaten and raped in her weekend cabin. There appears to be only one difference - she is still alive. Which leaves Gratelli with two questions: how can these murders be stopped . . . and how does the killer feel about unfinished business?