The books that they offer on this basis are written specifically to support curriculum and often come with teaching guides and sophisticated features that let students interact with the books. (noshelfrequired.com)
It was not a coincidence that one of my most social students needed to interact with others about the book before I asked him to interact with the book on paper! (teacherscholars.org)
She also encourages letting the child interact with books without too much teacher talk. (letshomeschool.com)