The graphic novels like 'The Promise' are really important as they continue the story in a new format. They allow fans to see more of their favorite characters' growth and development. 'The Search' in particular gives a deep look into Zuko's family history, something that was only hinted at in the show. 'The Rift' also adds a lot to the lore, especially regarding the relationship between different bending groups.
They can be quite good. The art is often impressive, and the storylines stay true to the spirit of the show. However, it depends on your personal preferences for the format and style.
Well, it's important as it extends the story. It can explore different aspects of the Avatar world that might not have been fully covered in the TV show. It gives fans more in - depth looks at characters and their backstories.
One of the main themes is the power of friendship. Characters like Aang, Katara, and Sokka rely on each other throughout their adventures. Another theme is the struggle between good and evil, as seen with the Fire Nation's aggression and the Avatar's quest to restore balance. Also, self - discovery is important, especially for Aang as he learns about his role as the Avatar and his own capabilities.