Bitshift

I've wanted something like this for a while now, even though I own and have read most of Terry Pratchett's Discworld novels. It's been said that Pratchett's books are more valuable without a signature, given how often he manages to go on tour and do book-signings. However, whether you've got a signed or unsigned copy, you may be wondering about the major threads and themes that run throughout his books, and in which order they should be read. With 33 out now, it can get a little confusing.

These folks have put together a very nice visual guide to solve those problems.