Jo Walton’s What Makes This Book So Great is a collection of essays, originally published as blog posts on Tor.com. Familiar with Walton’s fiction, I was drawn to review her collection of non-fiction essays partially because of what I’d heard of Walton’s reading habits and what she herself reveals at the beginning of the book—Walton chooses what books to read the way some people choose which ingredients to cook with, relying on a mix of old, trusted favorites and exciting, untested novelties.