This book is a transcript of talks that Thich Nhat Hanh gave at a 21-day retreat in Vermont on the Sutra on the Full Awareness of Breathing, the meditation technique in which one focuses sequentially on body, feelings, mind, and objects of mind. In many ways this is a very fine and useful book, especially if one is unfamiliar with the sutra.
Unfortunately, behind every great author is a great editor, and this book could have used more skillful editing. Chapters are not divided in ways that make sense to the reader or facilitate learning the method, some passages could have been edited down for clarity, and there is trivial content (such as retreat announcements) that does not need to be included at all. What is most important is that the book clearly convey the information and insights to the reader, not that the reader get an exact stenography of everything said at the retreat. (The section with retreat participants' questions is interesting and helpful, however.) Also, a shortcut chart on the inside cover showing the sixteen steps of the meditation method would have been helpful.
Readers who want to learn the Sutra on the Full Awareness of Breathing and the 16-step meditation method it describes would be better off reading Thich Nhat Hanh's book "Breathe, You Are Alive" first, and perhaps reading this one for review after having learned and practiced the method.