P is for Peril by Sue Grafton

Kinsey is hired by Fiona Purcell whose ex-husband, Dow, disappeared two months ago. Dow is now married to the much younger Crystal which upsets Fiona to no end. Fiona doesn't believe the police are doing a good job, so that's why she has hired a private detective. Dow is the medical director at a senior living residence called Pacific Meadows. After a little investigating, Kinsey finds out that the facility is under investigation for Medicaid fraud. Could Dow have disappeared with loads of money or did he come to a sinister end? Suspects and motives abound for Kinsey. In addition, she's found the perfect office to move into, but is the place too good to be true? What a satisfying book, made all the more bittersweet by Grafton's death last year.