Stuart M. Kaminsky: Lieberman's Folly (USA 1992)
From the Publisher:
Sixty-year-old Chicago police detective Abe Lieberman is having all the troubles he can handle when Estralda Valdez, a stunning Mexican prostitute, comes to him with a proposition he can't refuse: Estralda will help him with valuable information if he'll get a john off her back. But Lieberman's good intentions pave the way for a brutal murder. A murder that will lead Lieberman into the darkest depths of Chicago crime and corruption, and into the kind of trouble that could get him killed...
Stuart M. Kaminsky: Lieberman's Folly. Ballantine Books, ISBN: 0804109249 (March, 1992), 200 p., $4.99.