Well, actually, the book was debunked a long time ago, but I just found out about it yesterday.
Turns out that The Education of Little Tree is not autobiographical—it’s a hoax. It was written by Asa Earl Carter, who later reinvented himself as Bedford Forrest Carter and published the book—an excellent work of fiction, by the way—as the story of his childhood. Carter was actually a racist and is one of two speechwriters believed to have written the notorious “Segregation forever” speech for Alabama governor George Wallace.
Another myth shattered.