The Cut - George P. Pelecanos

Spero Lucas has a new line of work. Since he returned home to Washington, D.C. after serving in Iraq, he has been doing special investigations for a defense attorney. He's good at it, and he has carved out a niche: recovering stolen property, no questions asked. His cut is forty percent.
A high-profile crime boss who has heard of Lucas's specialty hires him to find out who has been stealing from his operation. It's the biggest job Spero has ever been offered, and he quickly gets a sense of what's going on. But before he can close in on what's been taken, he tangles with a world of men whose amorality and violence leave him reeling. Is any cut worth your family, your lover, your life?
The first in a series of thrillers featuring Spero Lucas, The Cut is the latest confirmation of why George Pelecanos is "perhaps America's greatest living crime writer." (Stephen King)