The concept of having one book that covers spiritual philosphy, detailed yoga sessions, meditation practices and alternative diet theory is a noble goal. It is difficult to execute that goal though, especially in an easy-to-read format like Baptiste tries. This book may be useful for those already with some experience in yoga, and spiritual quests, but may be disjointed for beginers.
The first part of the book lays out 12 good spiritual "laws" and is a great mixture of Eastern and Western spiritual guidelines, quoting Jesus, Buddha, Ghandi, and others. This is worthwhile reading, and may touch on a foundation for spirituality that will resonate with many Weterners. Very Intriguing, I wish there was more here.
The Yoga Vinyasas are much more difficult to follow, with over 30 pages of writing and photos showing the first 20 minute session alone. Yoga appears to be Baptiste's primary fame to date, and where most of the pages of the book focus. Video may be a better format to get Yoga across. I run one of Rodney Yee's videos (albeit with a different sequence of Vinyasas) and use Baptiste's photos and description to give me details if I don't know a pose.
The diet sections are confusing, I saw Baptiste in a lecture and I'm not sure he even understands what is written here ( was there a ghost writer helping?) Still, their focus on balance in a diet, and balance from many viewpoints (including building vs cleansing, cooling vs heating foods)is good.
The meditation emphases and "Excavation questions" are good also.
Can one have a personal revolution in 40 days with this book? The book is too new to know so stay tuned. From what I see, there needs to be significant supplements as far as reading and instruction for this to be the main catalyst for such a revolution.