I think the only people who read this from cover to cover are the authors and editors, possibly some unfortunate students who use it as a text book. All in all it's a decent book. Any book that lists eating animal products as fine and dandy has an implicit problem. There are some dietary suggestions that I would like to kick the authors for including because they are flat out wrong. This is especially a problem considering the source - the ADA. This is an organization that is supposed to help people. If you can't trust the ADA, who can you trust? I don't trust them, because of their association to certain industries that would be outraged if the ADA told people to cut animal products and processed foods out of their diets. So rest assured that there is some quality science in this book, but there are also horrendous errors that seem to stick with the status quo - "eat cheese, get your calcium; milk's a good source of vitamin D; you need meat to ensure you're getting your protein; make sure to get 'complete' proteins". It's also quite obvious that more than one person (company) contributed to the book. There are plenty of contradictions from one page to another.
I'm not going to completely say the book is worthless, because I found some good technical information in it and I also feel like they at least tried to point out some benefits to eating a plant-based diet. I guess the underlying problem is that they serve too many masters. You can't provide people with the information they need to heal themselves and at the same time appease industries that need to sell products that destroy people's health. Industry doesn't like disparaging ideas.
Or maybe, this book deserves to be trashed because of the source. In Sportscenter fashion, here's a Did You Know: Did You Know that the ADA tried to have members of their organization decertified for telling their patients that they should stop eating dairy and animal products? The official line is that all foods can be part of a balanced diet. I would call bullshit on that. Most foods that we eat today are invented foods that should never have seen their way on to our plate. There's another joke, the ADA supports MyPlate.gov - you can follow their advice all the way to your grave, which a vast majority of us are currently doing.
Take what you will from this book. Like I said, I got some quality technical information out of it, but not so much good advice on the actual diet.