Once upon a time, I had to DNF-ed this book but I have to read it because I have the next book as an arc. It was a difficult book to read now that there was some revelation about a character I had predicted would be the big bad but if you've read Riley Jenson series and know about what happen to Riley's werewolf mate, this book probably another reincarnation that rank up next to that. Keyword : Rape. This time it was not as subtle as the previous books does. If the subtle pissed you off, well... 
 Truthfully, I was tired with this series. It was another who-dun-it plot with Risa. This time, she had to solve a murder involving Hunter's lover who had his inside suck up until all that was left was a dry husk. It would have been tolerable had we didn't have the same detective work in the last few books. If Risa was a supernatural bounty hunter or a guardian like Riley, it might made sense why she should investigate all these but she was a restaurant owner, a rich kid and drive a Ducatti all around the place who just happen to have demon busting moves and the girl everyone need to find all those hellgate keys. I wish the series was all about the actual keys rather than it being a subplot. For the only one person who could find the keys, she sure had a lot of people stealing them whenever she found them. 
 This book suffered a middle of the series slump. There was no character progression that differentiate the character motivation from the previous books. Of course, something happen to the main character and all hell break loose but it was another round of drama between Risa and Azriel with some shocking revelations in the end. It was predictable and unattractive. Sadly, I don't have a book contract for a long series but I know the sound of an author struggling to end a stale series.