I admit, I was slightly skeptical about reading these books, but man was I wrong! The Song of the Lioness Quartet is an awesome adventure series about a girl named Alanna who dresses up like a boy so she can become a knight and become a knight she does. They are fast moving and include adventure, fighting, magic, romance, politics and intrigue and all in a great little package instead of the fat books popular lately.
Try it out! I promise you won't regret it!