You can adjust the aesthetics and style of your titles later, once the book’s structure has been tested and proven, toward the second half of beta reading. If you prefer long chapters without subsections, or if you want to use clever and punny titles, then that’s the time to make the switch. But throughout the design and writing process, treat your ToC as what it really is: a detailed blueprint of your book’s education design, learning outcomes, and takeaways.
