Norman Parker's Parkhurst Tales is an excellent read in terms of autobiography.
He spent over 30 years in britain's jails and his telling of these times is very revealing about what goes on behind the closed doors of british prisons.
Also immensly enjoyed Jeffry Archer's Prison Diaries.
Kerry Katona ...never really liked her, but she had a terrible childhood and I see her a bit differently now, I'm not an autobiography fan but I quite enjoyed it
I read Paul Gety's autobiography years ago and found it quite interesting. A different person to what is generally percieved. It was this book that helped me to stop smoking!