Things get serious. 
 It's the 4th book and we're progressing into the overall story. The Wizards and the Vampires are at war and so far the wizards are losing. Desperately in need of allies both parties are courting the Fea. So now they have to court favor, or more specific: solve a murder... 
 And of course Harry drew the short straw... 
 In short: a good novel with lots of new info on the Fea, some cool characters and more development on a personal level for Harry himself.