Solid 4/5 stars! 
 I really enjoyed the characters and was really engrossed in the story (well, I did read it in only 2 days). The plot was good and the pacing much better than in the previous books I read by Michael J Sullivan (I really liked the riyria revelations but the first book was going way too fast, and the 4th one (the one where they go on a ship?) was going way too slow. As I read all 6 books in a row I had found it all a bit weird. But anyway, on one book of this serie is out so far so only time will tell! 
 To continue with the comparison between both series, the other problem I had with Riyria was the dialogues. Sometimes it really didn't sound natural and it pulled me out of the book. But that didn't happen here so that was another improvement. 
 The last thing though is yet anothet problem that I had with Riyria (I swear, I liked that serie!) but had again this time around : some revelations come out flat because anyone could have guessed them 300 pages before. And there's a lot of twists in those books, which is great but from the moments you get hints... Well those are no hints really, I'm not even sure they are supposed to be. Are we supposed to get it but not the characters? But we get the exact same infos as them so that just make them look completely dumb.... And Persephone and Suri surely are not dumb... So it was all a bit annoying. 
 Fortunatly a lot of twists and revelations happen without any hints so I was still surprised when they happened. It's certainly not all bad. In this case I was not so much annoyed by the reveal being so obvious as by the fact that I really think at least Persephone should have seen it. I hate that characters are made stupid for the sake of a twist or a reveal... 
 So that took a star away. 
 Oh and also, Persephone sounds way too much like Arista. It's really the exact same character in my mind... I guess I wouldn't have seen that if I didn't know it was the same author but when you know... Well, she can still change though, there's 4 books to go, so we will see ^^