It's all about books that people read, not books they don't read. Nobody's going to read Mein Kampf because it's a boring screech. For example, Harry Potter is

It's all about books that people read, not books they don't read. Nobody's going to read Mein Kampf because it's a boring screech. For example, Harry Potter is on the 2019 list of challenged/banned books. So popular titles are going to get challenged for various reasons.