As a psych thriller reader, this one hits the mark for character development of Valerie, San Fran homicide detective, victims, and even the killers. It is brutal though- in language and situations, more realistic than many that may allude to abductions and experience without as much graphic detail. Not a 'cozy' thriller.
I do like the variety and tenacity of the female characters, from the homicide detective to a 10 year old daughter to adult captive.