The Science Of Discworld
For some reason, I was under the impression that this book was a collection of short stories set on Discworld. I'm not sure why I thought that.While it's definitely not what I expected (duh), it was a very enjoyable read. I love Pratchett's way of reading, he can make anything interesting. And, being a major science nerd, the subject was already interesting to me. Maybe it was a very superficial approach to the science, but it gives you a very good, general idea of astronomy and physics (at least the current theories).