The continuing adventures of Kara Gillian - cop and demon summoner. She is still coming to terms with the deal she made at the end of book 2, still wants to pass the "just friends" boundary with a certain co-worker, and is trying to maintain a balance between the benefits and costs of dealing with demons. 
 Note to the uninitiated: The demons in this world aren't your fire and brimstone variety. They are from a different dimension, will do tasks for a price, have a deep sense of honor, but will still rip you to shreds if you cross them. 
 We get to see some other magical abilities, there's golems, and lots of snark. I must add that Jill is one fantastic best friend. There are several times that I wanted to shake Kara, but then I remember that 6 months prior to this book, she'd basically been a friendless hermit, so I get her social awkwardness. 
 One very big reveal here. Really looking forward to the next one.