I believe there is an argument to be made that it is a derivative work. If you read a copyrighted book verbatim, that's an infringement, but if you summarize a

I believe there is an argument to be made that it is a derivative work. If you read a copyrighted book verbatim, that's an infringement, but if you summarize a book, that's fair-use. I don't think almost any of this has gone through the courts so there is a lot of legal peril and speculation though, obviously this is all super hot and pushing the boundaries so I'm sure we'll get clarification sooner rather than later.