Life at the Limit by Graham Hill and Flat Out, Flat Broke: F1 the Hard Way by Perry McCarthy are two of my favorite racing autobiographies. The Racing Driver by Denis Jenkinson offers an interesting analysis of competition drivers, with a lot of Moss anecdotes.
And if you're in the mood for something that smells a little less of petrol (maybe you want to discuss what you've read with non-gearheads, I don't know), 100 Mistakes That Changed History is interesting. I attended Bill Fawcett's mini-lecture series on a cruise ship some years ago.
If you are a comedy fan, I can recommend the autobiographies Born Standing Up by Steve Martin, Comedy Comedy Comedy Drama by Bill Odenkirk, and I Shouldn't Even Be Doing This by Bob Newhart.