For me, this book was a solid 4 stars. I've given four stars to all the books in the series, but sometimes I think I was being generous. So far, I haven't read the five star book in this series. I've had issue with most of the books (excluding the first three which were set up as an ongoing story arc) because after the first three books the mysteries started to get a little muddled with us finding Riley taking on 2 or more cases at once. What kept me coming back to these books when the storylines went this way was the ongoing story of Riley's personal life which we've been learning about obviously since the beginning of the series itself. 
 With Deadly Desire I can finally say that the mystery murder cases made sense as a whole and I didn't find myself mistaking one person for another or wishing that the case solved early on in the book was the one that lasted until the end because it was better than the main storyline. No, with this book I thought all the pieces fit well together, and at the same time we are set up with what we may be expecting in the last two novels of the series. 
 I really liked the way Keri Arthur handled the Kye and Riley storyline in this book. It was almost perfect to me. Their built up tension and inexplicable attration to one another was wonderful. It had me interested in where it was going since both of them really don't like each other. And the end revelation between these two was great. I know it wasn't great for Riley, but for me it was written very well. I like the conflict that I'm sure will ensue in the next book. I'm interested to see where it goes. 
 I liked Quinn and Riley's relationship in this book. You can see that they've both come to an understanding about the other, and I like that they are making it work. I would be unhappy if Keri Arthur kept Quinn around for the whole series (even when he wasn't in the novel he was still there) and not have them end up together. Quinn has definitely shown especially in this book that he will fight for what he wants with Riley, and I like that Riley is giving him more of a chance than just settling with him until she finds her soul mate. 
 The sex was toned down a bit in this book, but don't worry there are still plenty of steamy scenes. Riley has basically become a one vampire girl and it's nice to see. It feels more mature than the previous books where she would sleep with almost anything / anyone. She herself is taking into consideration Quinn's feelings (as she should if he considers hers) and is making a true effort, and it seems like she has nothing to complain about. She still flirts plenty, but there is a difference between flirting and acting on the flirting. 
 I wish the other books in the series had flowed this nicely and been so strongly structured as this one. Who knows, if that were the case this book might have been the five star book. Regardless, I have enjoyed this series for the most part and I am really looking forward to finishing the series to see how things wrap up. Until Then!