Watch Your Back (Donald Westlake)

An especially fine example of a Dortmunder comic crime novel. A pompous and wealthy financier is at Club Med hiding out from his ex-wives and their lawyers, leaving his New York apartment empty and vulnerable to Dortmunder's crew. Meantime, some Mob-connected guys have their talons into the OJ, where the crew meets, so they decide to do something about that also. Everything goes south, of course, in the most unexpected ways. Quite a ride!