Storm Front
First of the Dresden Files Series introduces Harry Dresden, Wizard For Hire.
In this book Harry attempts to solve a series of ghastly magical murders at the request of a detective in the local Police Department, and tackle a missing persons case at the same time. All while having to deal with Madame who happens to be a Vampire, dark Magicians, being under constant surveillance by the wizard’s council and, oh, the local Chicago mob.
It’s a pretty entertaining romp if wildly nonsensical at times. I’d recommend it if you’re looking for a decent piece of fantasy horror with a nice dash of humour.