I like the Ilona Andrews writing duo (who has a great blog by the way). Okay, so I'm a fan, but I'm starting to wonder where things are heading... 
 They have create a landscape that looks like nothing else I've read about, with modern Atlanta being torn between modern technology and waves of magic crashing unpredictable of over the city making technology grind to a halt until the magic ebbs again. I must also say that I love the vampires, which are just as God someone else intended. Shriveled spider-like mindless monsters that does anything to fulfill their thirst for blood.. if they're not under the control of a necromancer. This is how the book starts, a necromancer looses the control of a vampire and Kate is called in to save the day, but what caused the necromancer to loose control in the first place and what prevented the head necromancer to regain control? 
 So where was I, yes where is the series heading? I honestly don't know, but the problem is I'm not sure that they know either. The big glaring question is of Kate's origin and what she is, but that isn't addressed, instead a lot of attention is spent on adding new creative additions to the world, to the point that it's getting cluttered. Well enough's enough.