Zeid emphasizes that CAD/CAM is not two separate things; it is one database. Any change made in the CAD model must automatically update the CAM toolpath. This is the precursor to what we now call and Generative Design .
If you search for the "Ibrahim Zeid CAD CAM Theory and Practice PDF," you are likely looking for the (published 2009), which added substantial content on rapid prototyping and internet-based collaborative design.