Wasn’t sure how to phrase this question but do you know of any examples of authors utilizing pre-existing settings or worlds from other authors to create stories in the same universe?
I understand some big franchises like Warhammer 40k and the Halo books have many books by many authors but I would more interested in side stories from other characters (pre-existing or not) set along a similar time period as the original story. An example of this could be Enders Shadow being a side story to Enders Game.
Bonus points if it is a separate author crafting their own take on what another character would could go through in the same setting.
by Opolopalus