"H" is for Homicide / Sue Grafton 256 p.

Kinsey Millhone goes undercover when she discovers a massive insurance scam.  She becomes a confident of Bibianna Diaz when they are jailed together in the police round-up after the murder of one of Raymond Maldonado's cohorts.  Bibianna is petrified of Raymond (they have a history).  Kinsey stays in character while gathering the goods on Raymond.