Avatar the last airbender is the story of the Avatar. A reincarnated person who can control the four elements, water, air, fire, and earth. Others can only control one element or none. This show has some Asian mysticism, for example, there are spirits of forests, of the moon, of the ocean, and so on. Otherwise this show has a good message in never giving up on people, or yourself. In the first season, The main character Aang (the avatar) was discovered frozen in ice by two other characters... Katara (a water bender) and Sokka (Katara's brother, not a bender). Aang, Katara, and Sokka search for a water bending teacher in the North Pole, they fly on their flying byson, Appa (who was also frozen with Aang), Aang realizes that he is 100 years in the future, when he was frozen, everyone thinks the Avatar has disappeared. Since then the fire nation has killed all of the Air Nomads (except Aang, because he was frozen) and invaded other places, including killing Katara's mother. Another two characters, Zuko (who was banished from the fire nation and has a large scar on his left eye) and Iroh (Zuko's uncle, a cheery man who loves tea and gives great advice) were sent out to find the Avatar.
One thing that is great about this show is the story of Iroh, Iroh was a fire nation general when Zuko was a young child, he thought he had the vision to capture the earth kingdom capital... when he went to the city, he had a major defeat, including losing his son in battle, almost all of his advice to either Zuko or others comes from his past experiences. He is almost a role model to children because he was on the path of evil, but he turned away from it and is trying to do the same with Zuko (he is trying to stop him and turn him good). That is partially the first book (more like the first episode) but this show is great for people, it is violent because of the bending and all, but other than that, its a really good show.