Book a little viellot and life principles that are described in it are a bit extreme (see sectarian) and sells a yoga outdated ideology: we must practice every day 2 hours before meditation sessions (that's normal when you are a regular yoga), in addition to becoming fully vegetarian, restrict the quantities of meals at very small doses and you have to have a rhythm of life that can only be acceptable if we get up at 5 in the mat for the minimum rest of his life. In short bcp judgment on living principles that are difficult to adjust with a professional working life and family life. But the positions and sequences are well explained anyway. For a first book of yoga I would advise against, but when you know to sort out what to take and throw, or how to adapt to his level positions (since they are explained and shown very advanced positions) the book can be a good complement
