This product includes Stephen W. Porges' The Polyvagal Theory and The Pocket Guide to the Polyvagal Theory. 

The Polyvagal Theory compiles, for the first time, Stephen Porges’ decades of research. A leading expert in developmental psychophysiology and developmental behavioral neuroscience, Porges is the mind behind the groundbreaking Polyvagal Theory, which has startling implications for the treatment of anxiety, depression, trauma, and autism. Adopted by clinicians around the world, the Polyvagal Theory has provided exciting new insights into the way our autonomic nervous system unconsciously mediates social engagement, trust, and intimacy.

Since publication of The Polyvagal Theory, Porges has been urged to make these ideas more accessible and The Pocket Guide to the Polyvagal Theory is the result. Constructs and concepts embedded in polyvagal theory are explained conversationally in The Pocket Guide and there is an introductory chapter which discusses the science and the scientific culture in which polyvagal theory was originally developed.

The books are packaged as a shrink-wrapped set.