Comment by delusional
Comment by delusional 13 hours ago
> No one is using this as a substitute for buying the book.
You don't get to say that. Copyright protects the author of a work, but does not bind them to enforce it in any instance. Unlike a trademark, a copyright holder does not lose their protection by allowing unlicensed usage.
It is wholly at the copyright holders discretion to decide which usages they allow and which they do not.
Of their exact work, sure, but Cliff notes exist for many books and don't infringe copyright.