How many books of Avatar the Last Airbender are there?

Answer 1

There are three:

Book 1: Water

Book 2: Earth

Book 3: Fire

They didn't do an Air Book because Aang already knows airbending, not to mention the whole air tribe is extinct bar Aang and his son.

Answer 2

There are 20 chapters in Avatar: The Last Airbender Book 1: Water. The episodes are Episodes 1-20.

1. The Boy in the Iceberg
2. The Avatar Returns
3. The Southern Air Temple
4. The Warriors of Kyoshi
5. The King of Omashu
6. Imprisoned
7. Winter Solstice Part 1: The Spirit World
8. Winter Solstice Part 2: Avatar Roku
9. The Waterbending Scroll
10. Jet
11. The Great Divide
12. The Storm
13. The Blue Spirit
14. The Fortuneteller
15. Bato of the Water Tribe
16. The Deserter
17. The Northern Air Temple
18. The Waterbending Master
19. The Siege of the North, Part 1
20. The Siege of the North, Part 2

Answer 3

There are three books in the Avatar: the last airbender, but the series "continues" with the ledgend of Korra, where all of the last characters are dead, (except Katara) and Korra's the next avatar.

Answer 4

There are 3 seasons and 61 episodes (or chapters). Books 1 and 2 both have 20 chapters, while Book 3 has 21.