Heather Dixon's Entwined
This is just a delightful book--and at times, scary, intense, romantic, and hilarious--reworking the twelve dancing princesses fairy tale. Azalea (all the girls are named after plants) is the oldest of eleven--soon to be twelve--sisters living in a castle with remnants of magic in it. When their mother dies, and their strict father forbids dancing, and then they find a magical dance pavilion with a mysterious Keeper, well of course they go dancing every night. But obviously you can't just hang out with a mysterious Keeper all the time and expect things to go okay. Some plot points are easy to telegraph, but since this is a fairy tale kind of story, there's really nothing wrong with that. And I loved the ending. A.