I've been on a biography and history kick lately and have a curiousity about space and manned/unmanned space exploration. I tend to enjoy learning best through narratives and personalities with supplemental Wikipedia searching - so bios or similar types of books work well for me.
Does anyone have any favorite books in the spirit of that (doesn't have to be bio)? What books geek you out about space exploration?
If you prefer something a bit lighter, Men from Earth by Buzz Aldrin was pretty good.