I really am not finding this book very good. Although data and security are logical flows, there's no diagrams. There are photos, some of which are inexplicable. And there are 'text boxes' with points of note. Most of which are banal. The fundamentals are in here, but I wouldn't spend the money and would want to find them elsewhere. There's also no innovative thought on security and its impact on organisational efficacy, and how to overcome that.