I have actually just skimmed this book, since after a very few words into the actual codex itself, it became clear that I needed a companion volume (also by Bierhorst) to do my own translation. I'm fascinated by Nahuatl, being one of the relatively few native American languages that is not only surviving but thriving. As soon as I am able to make more headway on the translation, I will re-visit this review.