Monster Hunter International is the first book in Larry Correia’s urban fantasy Monster Hunter series, which has a pretty straightforward premise: monsters exist. People hunt them. The basic concept is sound enough for a fantasy series; now add an awe-inspiring knowledge of gun porn and a cheerful willingness to show no mercy towards standard fantasy tropes (particularly when they would run smack dab into modern life*) and you have perfect Kindle-fodder. Lots of fun.
So was Cthulhu 101, of course, but all things must end.
*The gnomes, from the second book. Dear God, the gnomes.