I don't read much Charlie Huston because the language is a bit much for my delicate (But I'm still bad-ass) sensibilities. And I haven't read this particular one so I don't know if the language will be present. At any rate, The Shotgun Rule is 99 cents today:
http://www.amazon.com/dp/B000UZJQ32?
His books are fast-paced and quite good.