First, I want to say that I actually figured out who was behind the murders before the book told me. Hooray! I'm not saying you should hire me to solve any murders any time soon, but I'm going to enjoy my small sense of accomplishment at solving something and not having to be hit with a clue by four to realize it. 
 So, this book. Oh my god. Ever since picking up the Kara Gillian series I have 1) renewed my hope in the PNR/UF genre and 2) devoured the books at a decent pace. Sins of the Demon was the first one where I read the entire thing in one sitting, staying up until 2 a.m. to finish it. It was really that good! 
 Picking up a bit after the last book, Kara's got a lot of crap going on. She's got a demon bodyguard, someone keeps trying to summon her to the demonic realm, someone's killing people who have wronged her in the past and the biggest shocker, (view spoiler)[Ryan is a demonic lord with amnesia. (hide spoiler)] What else could possibly go wrong now? Well, as we find out, a whole lot. 
 The newest addition to the cast, Eilahn, is Kara's demon bodyguard with a love of cats and a weird sense of humour. (I swear she's like my husband in female demon form.) She 'borrows' a shackle thing for Kara to wear that suppresses her arcane connection so that she cannot be summoned, but she also can't summon or use her othersight. Kara hates the shackle because it gives her constant nausea which, combined with her weird mood swings, makes her think that she's pregnant with Rhyzkahl's child. (Thankfully, she is not.) Speaking of my not-favourite demonic lord, he's barely in the book, keeping his Sephiroth-self (Yes, that's who I picture whenever he's described) and his deus ex machina powers in the demonic realm. 
 So Kara finally made a move on Ryan, yay! But she was actually being influenced by some kind of drug, boo! Why do you tease me so, Ms. Rowland? Oh well, even those few paragraphs of Kara trying to get up on Ryan earned a few re-reads from me just because. For some reason I found it hotter than the initial sex scene between Kara and Rhyzkahl in Mark of the Demon. I'm just weird, I guess. 
 Sins of the Demon ends on a cliffhanger. No! I hate cliffhangers! *tosses Sins of the Demon onto the bookshelf and picks up Touch of the Demon.* 
 Cliffhanger aside, Sins of the Demon is getting five stars, which is a rare rating from me. Well-deserved, in my opinion!