The yoga studio I attend did its own 40-day yoga challenge premised on Baptiste's 40-day revolution. Baron does a great job combining pictures of the poses with his explanations. He talks about how yoga goes beyond the mat with the proper diet and mediation, making for a much healthier person. I will continue to use this book as a reference guide for refining poses and understanding the benefit of each one.The binding on my book loosened and a section fell out after the first several days of use. Books cannot be returned per Amazon policy, however, so this is the only downfall since it would be nice to exchange it to have a book that holds together when I am continuously reaching for it.