Mary Roach's new book, "Packing for Mars: The Curious Science of Life in the Void", is pretty interesting and I recommend it to anyone wanting to learn about some of the prep work that goes into space missions.
I got it entirely because I enjoyed her previous book, "Stiff: The Curious Lives of Human Cadavers."
Here's the author's site for the book. Rather than write my own description of the book, I'll just point you to the NY Times review. Newsweek liked it also. That should about cover it.