I am happy with Book's play to date. Book's spin and roll to his right was becoming so habitual that it was only a matter of time before a good DC countered it. He does need to work on his downfield throws or we aren't going to be 12-0. This wasn't a good defense we faced without it's best defensive player and we still only scored 19 points.
We'll see how Book (hopefully with assistance from his coaches) adapts and how the offense evolves to best manage his strengths.