Billy Jensen and the Bear (Russian Mob Boss, cuddly like grizzly bear...)
Avoid the Bear. Never owe him or make promises you can't keep, and never, ever tease the Bear. Fast read little novella, or maybe just a short story. Well written, holds attention, left me wanting more! Fortunately for me, there's another book in the series. I sure hope it's longer, or I'll be writing to his editor and demanding more!