The Twelve Dancing Princesses is not actually a fairy tale I'm very familiar with, but I loved this treatment of it.
I can't believe it's taken me this long to read it.
Extra bonus, the cover is gorgeous. As are the covers of the other two-- Princess of Glass and Princess of the Silver Woods (due out later this year! Hooray!)
Overall, totally recommended. Highly enjoyed. Stayed up too late reading it. :D