These chapters are used mainly to facilitate the look up of a particular recipe, as each recipe exists and is explained independent of one another. This is consistent with the style of most Cookbooks, and it seems to work well here as well.
The only minor compliant I have with this book is the length of some of the script examples- they span a little too long to follow effortlessly. The longest script I can recall in the book runs about 5 pages in length. Fortunately, such recipes are few and far in between, and 95% of the recipes are extremely short in length and packed with useful information and techniques. For the long scripts, it's easy to discern they exist out of necessity to create and show a fully functional script rather than just to pad pages.