You know, I've never heard anyone say that 'The Discworld' series of book is evil, but that's because there hasn't been a movie yet. It is a humourous fantsy series, and they have magic and many gods - it's just screaming out to be called evil if there is eventually a movie to come out. Also, the recurring main character is Death - he is the main charcter in a few books, and appears in each book, even if only for a couple of words.
The first Discworld was written in 88, I think, and there are now over 30 books in the series (from the top of my head). Terry Pratchett, the author, is from the UK, and in it, he parodies everything, from the Catholic faith to the post office (Going Postal is the most recent book, and it is one of the best I have ever read). I think he has still sold more copies than JK Rowling - each of his books are generally reprinted once or twice a year.
His books are generally at the 300+ page mark, and they have very good plots, but with writing of the highest skill. There are many levels to his storylines, and most people who read one of his books become hooked.
His books have encouraged many people to read, in fact, one librarian was quoted as saying that she liked Discworld books, because they got people to read real books. Now, if you read one of his books, you can tell that they are 'real' books, but because of the genre - fantasy AND comedy, he is not taken seriously as an author by people who have not read his books.