That Thing At The Zoo (Deacon Chalk) by James R. Tuck

Deacon Chalk is not the usual kind of character whose tales we review. You see, Chalk is a PI-type (a bounty hunter) but he doesn't fight crime. He fights the supernatural. There's a lot to like about his adventures for crime fans, thought.
This is not supernatural romance like Twilight or even the Anita Blake novels.
This is action adventure in a horror setting.
Chalk is a fantastic tough guy hero, all tattoos and attitude as he hunts down a monster in a zoo. There's a lot of action, horror and the monster showing up int he end was quite a surprise!
Great reading if you like a little bit of supernatural in your PI diet.