I have seen the first movie, and I really liked it. I want to read the books, but I don't want to read all 4 if I don't have to. I have seen the first movie, and I really liked it. I want to read the books, but I don't want to read all 4 if I don't have to. I know that the first movie is based on the first book, but are the other movies based on the other books? Is it necessary to read all 4 books?