The notebooks say they are an excerpt from the book but some other place mentions you can read the book in its entirety in the posted link. So, the notebooks have all the content or part of the book?
To my knowledge, the notebooks include all, or almost entirely all, of the content in the print book. Jake mentions a few times in talks that the Notebooks are "compiled" into the O'Reilly book format. The nice thing about having the book as notebooks is you can literally "run the book as code" just by pointing Jupyter at that cloned repo.