A good followup to the first adventure of Mason and his not-exactly dog Louie, this one delves a little deeper into the magic and the world of "practitioners", which is Levitt's endlessly repeated term for wizards, witches, sorcerers, or whatever other term you can think of for a magic-user. (I found it a little overused, can you tell?
Mason is a good lead character, generally, bringing an everyman sort of perspective to the whole thing. He's not the smartest or most talented practitioner in the world, but he's got a good heart, some serious musical talent, and most importantly he's got an Ifrit (Louie). It lets him screw up, get in over his head, and ask a lot of same questions the reader has, which is fairly helpful.
The major plotline is...ok? There's supposed to be a strong detective aspect to this one, but I spotted the whodunit fairly easily this time, and I'm not usually the best at it. Probably the bigger issue is that the entire cast are also pretty oblivious and as a result there's quite a few unnecessary deaths, which people feel bad about but don't really take a lot of responsibility for. The whole scenario is enough to drop the grade a little.
Still, it's fairly fun and there's a little more exploration into this world and one of the best aspects is several people trying to figure out why some people get an Ifrit and others wouldn't, along with whether someone can create one rather than just hope one appears for you. That asks a lot of interesting questions and explores what makes this world a little different from other urban fantasies. Plus, Levitt never lets Mason drift too far away from the music, which really helps keep the character a unique and interesting personality.
I'll keep an eye out for book three.