This is my first Elizabeth Thornton book. I picked this simply because of the synopsis so you can say I "trespass" the trilogy straight to the last book. Well, reading this is like reading two separate books - one historical romance and the other historical whodunnit - so I guess I'm gonna write reviews from two perspectives.
For the romance part, it's kind of so-so to me. At first, Leon had been a Jerk (with capital J), although he made up for it later. I cannot blame Emily for hating him or feeling repulsed by him. However, Emily is not without fault either. I really enjoy the early chapters with Emily and Leon doing cat-and-mouse relationship game. It worked for a while, but at some point I became too tired watching Leon being insecure about his ancestry/nationality/manners over and over again; and in doing so blaming Emily. Worse, because Leon is 10 years older! I mean, your wife is only 21, dude! YOU are the one who suppose to have cool head in this. And about Sara, OMG, I want to slap her. Anyway, I think Sara's character will make more interesting heroine and storyline (not with Leon, though).
The whodunnit part would be fine....as a standalone. Okay, at the beginning the story mentioned about Leon's past affiliation with La Compagnie and how the sect was reviving. However, the end, the real culprit, doesn't have anything to do with that? And the motive is so 'duh!' Also, the change of pace and frequent POV shifts annoy me. As a reader, it was like I don't know what I am reading. True, from the beginning of the story the writer sometimes change POV to supporting characters (uncommon in HR), but in the last third the POV changes is so often it made me wonder if this is still Leon and Emily's story??? Why didn't you make it a crime detective story since the start?
Aside from that, the book is quite engaging. The use of three countries as settings works, the description is great. Well, my 3 stars goes for the description :-)