My review and rating is for all three books in the series. As an RH this failed badly for me because the three guys took so long to pull together. Two of them, Zeke and Jaxon, are twin brothers but at odds with each other. Zeke wants Jaxon's territory and is unhappy because Jaxon is alpha of their old pack. He challenged Jaxon and lost, but since Jaxon allowed him to live, he left and formed his own pack -- but he's always scheming for revenge on his brother.
The revenge motive felt so juvenile that it was hard to take him seriously. Meanwhile, Jaxon is attracted to Del, our succubus, but keeps pushing her away because he believes that as alpha, he can only mate with another wolf, he has to keep bloodlines strong, make his pack happy. Plus, he distrusts Del. I didn't like how he made assumptions about Del just because she's a demon. He never thought that she might have been brought to Earth against her will -- after all, she was summoned via a spell. He was so judgmental and contemptuous.
So, did I want either Zeke or Jaxon to be Del's mates? No, I did not. Cooper was cool and I liked him with Del. He really saw her for who she was and accepted her as she was. Zeke wanted to use Del to compel his brother so that he could take over his brother's pack. Did I want such a vengeful person, someone who would go against his brother even though his brother had been merciful to him, to be one of Del's mates? No, of course not.
I liked that Del has her friend Tarzi on her side and is protective of her younger sister. Del isn't a typical succubus and I also liked that she was careful about "feeding" from men, that she didn't want to just use them. The larger plot was interesting and carefully woven, but I just didn't like that the men were enemies. First Zeke captures Jaxon, then Jaxon captures Zeke... putting them in shackles and so on. I like RH because the FMC is always the centre of everything, and the men usually play nicely with each other for her sake. But here, it didn't feel like Del was the centre. She really felt like a side issue altogether as the two brothers battled it out. Really fail in the romance department.