Book rather well written, with a good layout, and an enticing summary. By cons, reading, we realize that these are only superficial overflights that even a draw (to borrow the title) to know minima. First part: A long litany of figures and justifications based on studies / surveys / tests in the first part which quickly becomes prohibitive and highly annoying because we try to learn, but not to achieve a 20/20 Natural Sciences bachelor! Second part: A little summary in the explanations, but interesting nonetheless. Nice friendly and nice color illustrations. Third party: Very good!