thats a good question. I'd like to read a good book on football.
The best (auto)biography I read was Back from the Brink by (tin hat firmly fastened on) one time Rag, all-time villa and Ireland legend Paul McGrath. Very hard life, struggles with mental problems, racism and addiction. Great insight into the game, brutally honest... at times very depressing and at times very funny.
I recommend it, great read.