An Autobiography that Surprised You With How Good It Was

I saw a thread earlier discussing the worst and most insufferable autobiographies that we've ever read. It got me to thinking that there were several autobiographies that I completely fell in love with, couldn't put down until I finished cover to cover, and made me a life-long fan of the writer.

The one that really comes to mind for me is "Confessions of a Prairie Bitch," by Alison Arngrim, who played Nellie Olson on Little House on the Prairie. Her life has been interesting, to say the least, and she has a way of writing that is vivid and conversational, so it feels like you're sitting and chatting with her over drinks rather than reading.

What was your happy surprise of an autobiography?