Pretty poorly written textbook to be honest. It was half a bad science book, half a textbook, and not a very good engineering book, that I found difficulty in it relating anything back to beer in an understandable manner. Listing things for the sake of listing them because they might exist or the pathway might happen takes away from the chemistry or biology of interest. It would be much better utilized if the focus was on the main pathway, and there was separate sections or paragraphs focused on alternative pathways or chemicals. I'd find myself through a page and jumping over chemicals, substrates, amino acids, and co-factors because it just seemed like a jumbled mess of listing them out because they are there. Focus is desperately needed.