If you're considering a side hustle that is relatively low-effort yet has potential for passive income, self-publishing blank books on Amazon Kindle Direct Publishing (KDP) can be a surprising choice. Many people are drawn to this method because it’s accessible—even beginners can get started without prior publishing experience. The concept is straightforward: you create and upload blank or minimally designed books, such as journals, planners, sketchbooks, or notebooks, and list them for sale on Amazon. These can appeal to a wide range of customers looking for custom or niche stationery products. Since the books have minimal written content, your main task is focusing on design elements such as covers, formatting, and appealing interiors that suit specific audiences or interests. From the OCR content, there's a fun perspective calling this a “Post Retirement Side Quest,” which perfectly fits those who want to try new things or earn extra money in retirement with flexible hours. You don’t need to treat it as a full-time job; even earning $75 or more occasionally can supplement your income while keeping you engaged creatively. Getting started requires setting up an account with Amazon KDP, designing your book’s interior and cover using free or paid tools, and publishing your listing. Marketing your book through social media, niche groups, or optimized product descriptions will increase visibility and sales potential. While this side hustle is relatively easy, it’s important to manage expectations. Earnings might not be substantial immediately, but persistence and identifying popular niches can improve results. It also helps to experiment with different book types and designs. Ultimately, self-publishing blank books combines creativity, entrepreneurship, and the excitement of launching a product. It is a fun and low-barrier way to test the waters of self-publishing and online business, perfect for anyone wanting to explore side gigs, especially retirees looking for meaningful projects.