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I want to make a game based on a copyrighted book. It's not about recreating it strictly with all details, but rather about building something new around the general idea (possibly incorporating some concepts from other books by the same author).
I don't want any copyright infrigement or plagiarism problems. How far can I move with "borrowing" concepts from the original story? Will it be fine to:
- set the action in the same universe? (possibly changing character names etc)
- use the same general concept (rather unique one), but with my own plot?
- let the player choose one of many story threads, one of which will be the original one?