3.5 
 Or 3 
 Or 2 
 Oh, whatever. 
 Well. 
 I liked the fourth installment in the Georgina Kincaid series as well as the other ones, though not for the same reasons. I liked the mystery of Jerome's summoning, and although not brilliant, that part was interesting, but while I enjoyed the developing and the conclusion of Seth and Georgina's relationship in the first three books, their "fling" - as G calls it - in this one was incredibly painful and annoying for me to read. 
 I don't like infidelity, and you would think that a one-thousand-something-year old succubus who cheated on her husband (which lead to her selling her soul to hell and living centuries with the guilt and the sorrow) would know that making her ex-boyfriend (who's still in love with her) cheat on her girlfriend (who's her best friend) by sleeping with him is not a good idea. 
 And that she would at least remember the simple effect of sin on human soul - as in, cheating on your girlfriend is a bad, bad thing to do that will send you straight to hell, especially if your name is Seth Mortensen. 
 Anyway, I think Richelle Mead tends to slack off after the first half of a series. It happened with Vampire Academy - which I loved until the fourth book, and then, not so much - and I've noticed that in Georgina's series too. I really hope the last books will be a little more satisfying.