Self-Publishing remains One of the Most Lucrative and Income Generating Business in 2026… ...and publishing "Low-Content Books" is becoming a rising star and becoming more and more popular in the market today. Let's be honest: if you're here, you probably already know how valuable this business plan is. In 2026, one of the best ways to make idle income is to self-publish through Amazon's KDP (Kindle Direct Publishing) and sites like Etsy.