The Earth Kingdom Chronicles: The Tale of Azula (Avatar, Band 2)

i am Azula,

daughter of Fire Lord Ozai, and l plan to one day rule the Fire Nation -- and the world. But first l have to deal with my good-for-nothing brother, Prince Zuko. Well, he was good for nothing, until he led me to the Avatar! l headed to the Earth Kingdom, where, with the help of Mai and Ty Lee, we tracked down the Avatar and his ragtag band. l engaged in a fierce battle with the Avatar himself!

l lost that fight, but he should be forewarned: He has not seen the last of Princess Azula.