This is a SUMMARY and not the main book. This Summary written calmly and superbly by Robert Bailey has no intention of replacing the main book but to convey the author's message in a very basic way. It is written in straightforward English language that may be grasped by individuals of all levels. It also sufficiently summarizes some salient points that you simply were possible to miss out on.
It is bigger friendly and equally time-friendly nevertheless valuable.