I will be teaching introductory computer science and am considering using a book [sample chapter] that is so well-written and self-contained that, at least for the first few chapters, it's not clear that the students need lectures. Should I just spend a few minutes at the beginning of the class giving an overview, then set them to work lab-style, enlisting TAs to roam the room with me? (I teach in a classroom with a computer for each student.) That seems lazy, but I'm not sure what value I can add (until the material gets more challenging around Chapter 4). FWIW, I'm a tenured professor, so I don't have to worry about being judged by anyone (except myself).
UPDATE: It occurs to me that something else I can do during classtime is meet one-on-one with students to find out what they hope to get from the course and how it is going for them.