An interesting examination of what exactly makes a "monster." I liked the sort of reverse-werewolf thing that the beast's curse entailed here: that he turned human for the 3 nights of the full moon. The part of the book that focused on that was fascinating and well done.
The last bit of the book seemed less well done to me. It hadn't been made clear to me that Lafarge was a bad guy. All I remember being told about him was that he was older and really rich. So it pulled me out of the story when Lyssette all of a sudden panics and has to dash to her sister's rescue to save her from marrying him.
I did like the ultimate resolution, having the Faery Queen come and undo the curse her daughter left on Bastien/Beast.
Overall, a nice story. Especially for being free.