Master of None by Sonya Bateman

Gavyn Donatti is the unluckiest thief ever, as his unlucky partners have found out. He was hired to steal a very rare item, and when he loses it, his employer is ready to take him out. Just as it looks like this might be his last job, Gavyn is saved by a djinn named Ian who seems extremely put out that he has to bother with the rescue. The two form a grudging alliance, and a whole world Gavyn never knew existed is revealed to him. Unfortunately it is a world in turmoil that has spilled over into ours. Gavyn himself is an eventual result of the conflict.

Gavyn's ex-girlfriend Jazz reenters his life when he asks for her help, as well as an old partner with some surprise connections of his own. While trying to neutralize the threat the djinn world has visited to his own, Gavyn learns to use powers he never knew he had, and finds he's made of sterner stuff than he ever believed possible.

This was a great series beginning, and I'm really looking forward to #2 which came out last month, Master and Apprentice.

This is my 4th read for the Horror and Urban Fantasy Challenge hosted by Book Chick City.