J have read dozens of math books before. This one disappointed me because: - It is full of emails without any interest to the reader - Lack a mediation effort / vulguarisation for the reader who does not have the level of m. Villani. And there are a few. desolated, I haven that a math PhD ;-) and I compends 5% of its allegations .... - It lacks a romantic thread that held the drive with the desire to turn pages - I prefer by far to other authors (eg Marcus du Sautoy) that "tell a story" with more talent in vulguarisant research behind the mathematician