Books like Guards! Guards!: The Play

I don't read science fiction or fantasy. Some might say that Pratchett is a fantasy writer. I say that he is a humorous satirist. This is the book that started my love of his writing, with at least a giggle on nearly every page, and "the sentence" that made me want to read anything he writes... ever... for as long as he can, in the face of his early onset Alzheimer's. And this is True Satire, not mere parody, but human foibles on parade, entertaining screeds, and one book with a marvelous meditation on morality.