He obviously caters to those studying. But, whatever our age, everyday life, especially in our time requires us to learn! From 7 to 77 years? No! 7 years before and well after 77 years! .. for those, precisely, that a healthy lifestyle, have maintained and developed their intellectual faculties. He's only 96 pages but blah blah, extremely well structured with some drawings, very clear paragraphs, although subtitled, with excellent typography, all facilitating the understanding and retention even in practice. A very neat work on all levels, with a great concern for efficiency. Some accused him of giving simple tips! What would be the advantage to omit them? Experience shows that they are not always followed! In the specific case of getting enough sleep, a scientific explanation is that for my part I had not taken into account! There especially how to learn efficiently and intelligently, as it says in 4th cover.
It is not complete? How could we go around the problem in 96 pages! It contains the essential and helps to a good start. We must also consider price While it was to be calculated on density and not volume (!) It would cost much more. The price is a trifle, content value. And nothing will stop you then want to deepen the subject by reading other books.
We must not deceive you there and wait for him to learn this book for you! It is you who will have to learn! But you will do it better, more efficiently and more pleasant if you follow the advice and apply the methods he recommends.