While the book itself is part of the Discworld -- wonderful series that are quite refreshing, smart and funny, but no doubt you've already herd all that -- the settings and the world feel not complete in the first, well, I think 3 books of the series. The materials and characters are yet raw, they grow out of it in later books. (For example, Death is shown to take a life at a whim which is not allowed later on).
So if you want to read the Discworld series I would recommend you start with the 3rd book or even the 8th book.