I would say, this is a good basic book. If you can apply it in real world then its okay. I mean, read this book and go to YouTube for SEO courses. you will get real life courses over the YouTube. I mean, having worked in Digital marketing, I would say, get some idea by reading the book. (you will hardly understand it), but once you watch the videos and then refer a book, then it would be crystal clear.
So,best strategy is to learn from YouTube and then get advanced knowledge from books. Nothing beats actual experience though.