I totally have a weakness for fairy tale re-tellings. I can't tell you how many take offs of Cinderella I've read, and Wicked is a perennial favorite for me. When I saw there was a new take on The Twelve Dancing Princesses I was intrigued - I don't think I've ever seen a re-telling of this one. I loved this story as a kid - I had a book of Care Bear bedtime stories and remember this one with lush watercolor illustrations prominently (no, the Care Bears weren't the princesses - the book had lots of traditional bedtime stories and then a few small Care Bear bits. I don't think Care Bears had enough girl characters to populate this particular story!).
However, Princess of the Midnight Ball left me vaguely disappointed. About 90% of the story doesn't feel like a re-telling of The Twelve Dancing Princesses, but rather just expanding upon the basic facts of the story. For me there's a difference between fleshing out characters and creating epic new backstories (I'm thinking of something like Ella Enchanted that completely re-imagined why Cinderella had to be so darn obedient to her family) and simply giving archetypal characters names and dialogue, as Princess of the Midnight Ball seems to. There's no clever twist here, nothing to keep you guessing - you know exactly what is going to happen on every page, turning this more into a long-form fairy tale than an exciting re-telling.