Small Gods was one of my favorites though I recommend people just start at the beginning. The earlier books are great too , you just have to read them more lik

Small Gods was one of my favorites though I recommend people just start at the beginning. The earlier books are great too , you just have to read them more like goofy fantasy novels from the 80s. They set up a lot of the general attitudes about magic and the Discworld in general that mostly carry through as the books continue.