Blood Money by Doug Richardson
Blood Money is an action-packed thriller with plenty of violence—it's not surprising to learn the author is also a screenwriter of action movies. The book is non-stop, it never gives you time to breathe.
There are several people whose lives intersect in disastrous ways. Few of the characters are likable, but you get their motives.
Lucky Dey is out for revenge against the man who killed his brother, if he can find him. He is relentless and is basically a renegade cop at this point. He is hard to like. He's mean and single-minded and just a tough guy. He is joined by Lydia "Gonzo" Gonzalez, his "chaperone" from the LAPD, who is my favorite character. She's a single mom who realizes how close to out of control Lucky is, but still hangs on for the ride. Lucky's interactions with Gonzo and her son let you see his softer side a bit, which helps.
The man Lucky is hunting is a...