Hit Parade by Lawrence Block

Stamp collecting hit-man John Keller is back and this time he's trying to save up a million dollars, so he can retire. As in previous books, Keller does most of his talking to Dot, the woman who arranges the hits for him. This time around, the verbal sparring is more central to the book than in previous outings, with a nice chemistry between the characters. At one point, Dot calls Keller a psychopath, and he spends some time thinking about whether he is, in fact, a psychopath.

Not the most important book of the year, but a pleasant enough diversion, and a quick read.