If I nominated all the Urban Fantasy books I love, this list would be ginormous, so I decided to pick four more recent UF books, and left out books I've already raved about more than once in the past.
So my nominations for Best Urban Fantasy Book are:
Shrill Dusk by Helen Harper
Three Mages and a Margarita by Annette Marie
How to Save an Undead Life by Hailey Edwards
The Burned Spy by K.A. Krantz
Vote for you favorite of these books, or nominate another book in the comments!