In the Hand of the Goddess (Lioness Quartet #2)
From Tamora Pierce, the second book in the Song of the Lioness Quartet, honored with the Margaret A. Edwards Award.
Alanna, disguised as a boy, becomes a squire to none other than the heir to the throne. Prince Jonathan is not only Alanna’s liege lord, he is also her best friend—and one of the few who knows the secret of her true identity. But when a vicious sorcerer threatens the prince’s life, it will take all of Alanna’s skill, strength, and magical power to protect him, even at the risk of surrendering her dreams…