Normally that's the case even though at least one of those books was taken down based on (rather dubious imo) violation of rights on derivative works. It was ne

Normally that's the case even though at least one of those books was taken down based on (rather dubious imo) violation of rights on derivative works. It was never a verbatim rewrite nor a trademark violation. The Dutch court even proceeded to make a list of similar ideas between two books which I think is explicitly disallowed under the US version of the copyright law. https://en.m.wikipedia.org/wiki/Tanya_Grotter https://en.m.wikipedia.org/wiki/Tanya_Grotter