Not as much writing as I had expected; most of the book is devoted to recipes. Many of them sound absolutely delicious, but I didn't have a chance to try them out. The writing is very interesting, and he summarizes appropriate tips near each recipe section.
I was hoping this would be more of an in-depth look at food science, more along the lines of Michael Pollan's books, but the majority of the book is devoted to recipes, most of which are either too complicated (or too unappealing) for a novice like me, or just don't fit within the lines of my particular diet. I can't really speak to whether the recipes are any good; it may be worth it for those who are more into cooking, but it was pretty much a wash for me; there were interesting tidbits but not enough of them. This really should be listed as a cookbook, as that's truly what it is.