When I was little I liked The Seventh Princess.
Fantasy - Young girl in a magic land becomes a heroine.
"Jennifer falls asleep on her bus ride to school and ends up in a beautiful but strange land. There people start bowing to her, calling her Princess Miranda, and catering to her every whim. It seem like a dream come true . . . until she discovers that the evil Duke Rinaldo has hatched a devilish plot to make her his next victim."
http://www.amazon.ca/Seventh-Princess-Nick-Sullivan/dp/0439260078