"Wolf Tower" is the first book in the Claidi journals by Tanith Lee. The Claidi Journals are young adult fiction, and I say they are at about a high middle school reading level. Her work has been compared to Gail Carson Levine's "Ella Enchanted."
Wolf Tower is the start of Claidi's story. She's a serving girl at "the House," and she's stolen the journal she records her story in from one of the ladies. Before you think poorly of her though, remember that as a servant she owns nothing, and the lady she serves is NOT fun!
One day a stranger arrives at the House, and being the suspicious people the are, they lock him up. Not that they manage to keep him there. Princes Jizania Tiger sets him free, for reasons of her own, and uses Claidi to help him escape, in the process setting Claidi free.
Now Claidi and the stranger (Nemian) are traveling to reach Nemian's home. Along the way they meet many different people, and Claidi learns that the world is far different than what she'd been told while growing up in the House. She also learns that she may not be who she always though she was.
This is a fun read. I would recommend it to any young adult, and to any adult! It's a nice, clean, fantasy that talks about growing up.