I'll use my third nomination to nominate yet another book.
I hereby nominate Hounded
by Kevin Hearne
Atticus O'Sullivan, last of the Druids, lives peacefully in Arizona, running an occult bookshop and shape-shifting in his spare time to hunt with his Irish wolfhound. His neighbors and customers think that this handsome, tattooed Irish dude is about twenty-one years old - when in actuality, he's twenty-one centuries old. Not to mention: He draws his power from the earth, possesses a sharp wit, and wields an even sharper magical sword known as Fragarach, the Answerer.
Unfortunately, a very angry Celtic god wants that sword, and he's hounded Atticus for centuries. Now the determined deity has tracked him down, and Atticus will need all his power - plus the help of a seductive goddess of death, his vampire and werewolf team of attorneys, a sexy bartender possessed by a Hindu witch, and some good old-fashioned luck of the Irish - to kick some Celtic arse and deliver himself from evil.
The following link is to a review. May contain spoilers.
From the review...
Kevin Hearne has done the impossible in Hounded, the first volume in the Iron Druid Chronicles. He makes druids cool, elevating the class beyond just a Kaiser employee with a better attitude.