How to Make Self-Publishing a Profitable Side Hustle

You’ve probably heard the flashiest self-publishing success stories. There’s The Martian, the sci-fi blockbuster that lost Matt Damon an Oscar in 2016. It began its sales life as a 99-cent Kindle download. And there’s the Fifty Shades trilogy, which infamously originated as Twilight fanfiction. Scrubbed clean of copyright violations and released through print-on-demand, it transformed Fanfiction.net user “Snowqueens Icedragon” into multimillionaire author E.L. James.

Of course, it’s not all...