New book structure

If you've been tracking this site for a while, you may notice that the chapter-based categories for each entry have disappeared. That's because the structure of the book has changed… Well, I did include disclaimers in the original announcement to say that it might change, and how prescient that turned out to be!

When the structure is definitely tied down and the book is nearing publication, I will go over all the entries here and assign them to categories for each book chapter. But it seems daft to do that now, in case things change again.