Chapter 2 was probably my favorite chapter of this book. I think Rothwell did a good job in that chapter going through the different adult learning theories. But a lot of the rest of the book seemed more tangential to adult learning theory--I guess that's why it's called "Adult Learning Basics," but I still think adult learning theories are one of the most important adult learning basics and could have used more face time. It may be that the other topics are topics Rothwell knows about, but I bought the book to learn more about adult learning theories, so I wasn't as interested in that part.
Also, I was a little disappointed with the references. I felt like Rothwell referenced his own work more than I expected, since I don't think he's developed an adult learning theory. There were also more references to Wikipedia than I anticipated. Not that there's anything wrong with Wikipedia. It's just that I expect more scholarly references in this type of book.
Anyway, there was some good information and some author's opinion in this book, but it did include a good summary of the most well-known adult learning theories.