"M" Is For Malice by Sue Grafton

Kinsey Millhone is hired to find a missing black sheep brother, no one has heard from him in 18 years. Within 3 days she has found him, and not everyone is happy about it. Robert Dietz, off and on "boy friend," arrives at Kinsey's door step and she isn't sure how she feels about that either. Mix in money, the Malek family, memories and murder and you get a twisted tale that leaves you guessing to the end "who dun it?" Great read.