The Aang Last Airbender comic features storylines that expand on the events after the original series. It shows how the characters grow and face new threats to maintain peace and balance.
There are quite a few. But the exact number can change as new ones might be released. You can check the official publisher's website for the most up-to-date count.
Most of them are suitable for a wide range of ages. They carry the same themes of friendship, heroism, and moral lessons as the TV series. However, some parts might be a bit intense for very young children, like the battle scenes and the exploration of complex political situations.
Another great one is 'The Search'. It delves deep into the mystery of Zuko's mother. It's really engaging as it unfolds the secrets and emotions surrounding this long - lost character, which adds a new layer to the overall 'Avatar' lore.
Some libraries might have physical or digital copies of the Avatar: The Last Airbender comic. You could check with your local library. Also, some official comic book stores might stock it.