Say I create a copyrighted written work, is there a license I can apply to that same work that will allow a third party to create and copyright a derivative work? Is there an existing license or copyright type that would allow the creator of a derivative work the ability to copyright their work, but only if it is a sequel and not an edited version of the original written work?
Is there an official license type applied by copyright holder that allows a written work to be continued upon/derived by third-party writers?
You have two ways to go here.
Add to book notes or social media or whatever you wish that you are open to people creating sequels and will grant permission to do so on a case by case basis. Then you have full control over who can write a sequel (and can weed out things that people call sequels that aren't).
Use an existing license like Creative Commons. Here, you have less work up front, though you still need to check to make sure people are using the license responsibly. And you have less control over what gets allowed.
A couple notes:
- Your work is already copyrighted from the moment you wrote it (at least in the US and many other countries). You have to explicitly transfer copyright or have the work enter the public domain to avoid being the copyright holder.
- Instead of saying "sequel" you may want to say "story set in the same universe."
2Creative Commons, being a copyright license, is typically about the text itself, though. So, say, by licensing under CC-BY-SA, you allow people to create derivative works (such as translations or adaptations) of the thus-licensed work, as long as those are themselves made available under CC-BY-SA, but I'm not at all sure it also would necessarily allow different stories set in the same universe (sequels or not). Being explicit about allowing sequels/same-universe-works/whatever-one-wants-to-call-it is probably the better approach, as it would be less open to interpretation.– userJan 15, 2019 at 20:33