He and I, as well as the publisher, went over the TOC for my book.
As we were going through it, I gained a new respect for publishers, as well as authors. I learned that a book should tell a story, and that the chapters & sections in the book should follow along with that story.
If they don’t, then you will find yourself with a book full of great content, but nothing tying it together. And that’s a book that won’t sell.