Goose Chase by Patrice Kindl.
Goose Girl's spunky voice rains down from her tower prison, while facing three ogresses, and after being tossed into a dungeon. This novel draws from a variety of European fairy tale traditions.
Princess Ben by Catherine Gilbert Murdock.
Princess Benevolence has been content living with her parents, the king's brother and sister-in-law, in small quarters outside the palace. Despite being heir to the throne, she's never had any desire to learn the stuff of rulership. But when her parents and the king are assassinated, she falls under the thumb of the Queen, who is insistent upon her learning all that she has hitherto neglected. When the queen locks Ben into the highest tower in the castle, the princess discovers a book on how to do magic, which can set her free. But with war in the offing, will that be enough to save the kingdom?
The Wall And The Wing by Laura Ruby.
In an alternate New York City, Gurl is the only one who can't fly. What she can do, though, is become invisible, a talent which allows her to escape nightly from the Hope House for the Homeless...until she's caught by the House matron, who blackmails Gurl into stealing for her so she can maintain her extravagant lifestyle (that includes expensive plastic surgery, caviar, and other luxuries). There are a lot of twists and turns, and a lot of quirky characters, including fellow orphan Bug, gangster Sweetcheeks Grabowski, creepy mechanical monkeys, a cat who makes effective use of indoor plumbing, and a mysterious professor.