I'm sure many of you know about this already.
There is a series of books called
Monster Hunter International by Larry Corriea.
I stumbled onto the first one through Audible, and have been listening to it while I drive.
It's a bit cheesy and cornball, but ultimately GREAT FUN. Basically a B-movie novel.
It's a modern day setting, and the first novel is rife with Vampires, Werewolves and best of all OLD ONES.
The gaming potential seems fantastic.
I just looked him up and turns out he seems to be a bit of a gamer/painter as well.
http://larrycorreia.wordpress.com/Also, he has a series of novels concerning a magically enhanced Private Eye based in the 30's. I've not tried those yet, but plan to.
I'm more interested in a modern Day Cthulhu setting anyhow, and this really helps fuel my imagination for gaming ideas.
Highly recommend!