This book is well written and interesting.
The anatomy of the breath is explained in layman's terms and illustrated so that even a child could understand its basic concept.
The book chapters are:
1. Initial observations about the act of breathing
2. The skeleton's role in breathing
3. Respiratory organs
4. Respiratory muscles
5. The principal forces involved in breathing
6. Forces affecting respiratory volumes
7. Relationships among anatomical structures involved in breathing
8. Analysis of the principal types of breathing
9. Practice pages
Practice pages include exercises for lamaze, costal, diaphragmatic and abdominal breathing amongst others.
Strongly recommend it to people involved in body work teaching. Even if you already know this stuff, the book may help you find ways to explain it to your classes more simply. At least this is what it helped me for.