At first, in leafing, this book may seem too technical or austere. In fact it is not. The author knows whereof he speaks, especially how to explain it. What is far from clear on such a subject. The tone is didactic but always pleasant, and the explanations from the base to go crescendo in difficulty so that we always manage to follow the explanation. For true beginners, it will be a bit difficult and it will be applied to the understanding, but it will never be too difficult. And for the more experienced, there are tons of things to learn from this book. Much knowledge accessible in a small package, bravo, I highly recommend it!
