Thank you to Bhikku Bodhi for his tremendous effort. If you are a serious practitioner, especially a lone practitioner as I am, this book is invaluable for making available the undiluted teachings of the Buddha himself. Most of the books in my Buddhist library have been helpful to some extent or other but most are explanations of the teachings, i.e. the Buddha's words once-removed. I rank very highly What the Buddha Taught, by Walpola Rahula. This book is much more extensive. It is also more accessible than The Middle Length Discourses (trans. Bhiddhu Nanamoli and Bhiddhu Bodhi) because it is organized into general topics, such as "The Human Condition" and "Mastering the Mind." Highly recommended as a life reference.