Avatar, the last airbender : the lost scrolls. Water

"If you are reading this, you have uncovered one of the four hidden scrolls I have compiled about the world of Avatar. This scroll contains all of the knowledge that I have gathered so far about the Water Tribes -- their history and culture and the great tales of their past and present. Katara recounts her discovery of the Avatar in the iceberg, Sokka remembers his childhood upon seeing their father's old friend, and Aang tells of his lessons wit...