Great autobiography with lots of wit, wisdom, and of course space stuff. I'm a NASA nerd, so no surprise I'd like it, but I was surprised at how much I got out of it. Not too technical or hard to read, with lots of insights as well as insider-info about the space program over time, and how astronauts are trained (and how their families deal, how much preparation's needed--mentally and physically, how opportunity knocks, etc).