Actual rating 3,5 (and I feel generous) My expectations were high since Stolen Songbird was just THAT good. So that's why I put 3,5 instead of 3. 
 I did not like : 
 - The fact that the major "plot twist" were soooo predictable (view spoiler)[The identity of Anushka. The way she achieved immortality (hide spoiler)] I mean, the first half of the book is Tristan manoeuvring troll politics in a very clever way. I would have thought he would be able to figure that one out. Especially will all the clues... (I figured it out page 168) Which okay to be fair he didn't know, but then there were so many of them later on. Sigh 
 - I didn't like the fact that Tristan and Cecile were sort of boring together. No banter, no teasing. That created something special in the first book that lacked here. The magic is gone for now. In Stolen Songbird, we knew for example from Tristan's POV how Cecile felt and I liked to see him trying to understand her. But now it's just mentioned and that's it. "Insert Mario Bros dying sound here" 
 - I finished the book without a favorite scene. In the first one, there were several, which I re-read a couple time. They were THAT good. But this one... no 
 I did like : 
 - The use of French. Being French myself I hate it when authors try to use it without research. Here Jensen did her homework. All the names come with proper accents : Cecile, Frederic, Angouleme, Anais etc. (okay except Genevieve) Even the use of French term in the text added a little touch : fete, soiree. There were 2 mistakes that I noticed though. You can't say La Voisin. Either La Voisine or Le Voisin. The genders are all mixed up. Then Louie in French is written Louis. (the s is silent so it would sound the same). A slight thing I noticed as well was the fact that names usually used for aristocracy were used for servants and farmers: Louis and Catherine. But then again, we are not going for historical accuracy, just thought I'd mention it. Best effort I've seen for an English author to use French so I'm not complaining. 
 - I loved Trolls politics. It's complex, rich and believable. (view spoiler)[I was giddy to see Tristan beat his father at his own game. Yay! Finally! (hide spoiler)] 
 - The pace was good (well after page 150 that is) 
 - It was good to know more about the motives of Anushka. I still don't like her, but it made me understand. (view spoiler)[It's so sad! (hide spoiler)] 
 - The table is served for the next one! And what a feast that will be! 
 - I look forward to see what the fey will come up with