That was surprising. If you go into this series thinking it will be just another dark hunter book. You will be very disappointed. It has a lot of the characters from the DH series and yet comes off feeling like a new series with a few parallel story lines. 
 Ups 
 We are introduced to Tory (Acheron's sweetie) she is cute and quirky. I can see her with Ash. 
 This is an up and down side- INFORMATION OVERLOAD. There is a lot of fun factoids about the world and the characters that you almost have to take notes to fully remember everything. 
 We get to meet hades and persephone for the first time. Here's hoping we see more of them in the future. 
 Downs 
 Arik is an ass in the beginning (a turn off). He isn't beyond saving and redeems himself before the end. 
 The relationship switches gears from "I hate you" to "I want to have puppies" before we can even blink. It came off as unrealistic. Even though they had wild sex romps before they met in the flesh I wished for something more along the first dream hunter story of Phantom Lover. Yeah, they had whoopee but they talked and got to know each other rather than just sex. We didn't get hardly any of that. 
 Book takes a more serious tone than the DH books.