The second of J. A. Konrath's detective novels starring 'Jack Daniels' of the Chicago police force.
Konrath actually managed to make me laugh out loud at multiple times during this one. 'Jack' is a fun character, grown-up enough to be interesting. This time the eponymous drink is named for Jack's mother, a former police officer and libidinous retiree named Mary. He went some places I didn't expect, in terms of violence....but hey, it's a book about a serial killer. I can't legitimately complain.
I CAN complain about the give-away early on in the book. Don't make it too easy to figure out who the bad guy is, Joe.