Book 3: Fire, Volume 1 contains the first five chapters (episodes) from the third book (season) of the Avatar series. The story continues from the previous season.
Aang and his friends enter the Fire Nation with the goal of covertly moving from island to island to the Royal Palace, where they will eventually confront and defeat the Firelord. The kids learn more about the people of the Fire Nation, and they are not that different from the people in other kingdoms.
More About Avatar: The Last Airbender:
Avatar: The Last Airbender tells the story of a 12-year-old Airbender boy named Aang (Zach Tyler Eisen), who is a master of all four elements - air, water, earth, and fire. The world is in a state of war since the Fire Nation went on the attack years ago, and Aang may be the only hope for restoring peace to a war-torn world.