Some of my readers know I used to write fanfiction (still do on rare occasion). Fanfic is an excellent way for a writer to build their narrative muscles, explore their author voice, get feedback on what they’ve produced, and enjoy their favorite media with a like-minded community of fans.

More specifically, creating “non-canon” dialogue and scenes using an existing IP lets writers practice their craft without as much requisite world-building. For example, a Harry Potter fanfic doesn’t have to...