I'm a huge fan of SM Reine. I love the majority of her books but found this series was less then perfect. I struggled to become engaged with the Ophila and found the books lacked all serious forms of character development. It's darkly sexual, which I generally enjoy but kept finding myself putting the book down and struggling to finish. It lacked all the charm of the Preternatural affairs series, and the development of the Descent series. Disappointing to say the least.
After reading all four stories, I am disappointed at the gap between books 3 & 4. It leaves out a lot of events and is a bit jarring. This series is very dear, and darkly sexual in nature so not for the faint of heart. Te overall premise is goose but I would lie to see they series rewritten and expanded.