I have to explain the 3 stars. I love The Hitchhiker's, although the last few books really ruined it for me. I read them without really following what was going on.

I was giving this book as a gift from work. It was rather of a backhanded gift as it is 5 years out of date now.

This is one of those great classic books that just HAS to be read.

Sequel to the FIrst Science of the Discworld book.

Real world science mixed in with a Discworld Book. The Wizards create and play with a round-world to see how it would evolve.