"This second volume — of the handbook of perceptual control theory — is a tour de force of how we, as embodied creatures, navigate our sensorium. It is written by people doing cuttingedge work in theoretical neurobiology – and beyond; ranging from controlled perception, through communication in neurodegenerative disorders to the ‘Theatre of the Oppressed’. The crosscutting theme is the circular causality inherent in active sensing and perceptual control–framed artfully as ‘living in the loop’. The ideas on offer testify to the fact that Perceptual Control Theory is a landmark theory in our journey of self-understanding – ideas whose fecundity is amply demonstrated in these pages." - Karl Friston FRS, University College London "It is a wonderful overview of the current state of affairs in the field and a just tribute to the founding father of PCT, William (Bill) Powers. This book is a must-read for anyone willing to gain a better understanding of hierarchical (perceptual) control theory and its ramifications to a wide range of scientific fields, varying from the physical sciences and engineering to clinical medicine and the humanities. The appearance of this book is very timely, as we dive further into an age that appears to be in a dire need for gentle hierarchical control." -- Dr. Rutger Goekoop, MD, PhD, Psychiatrist, Free University Amsterdam Department of Behavioral and Movement Sciences; Parnassia Academy, PsyQ, The Hague, Department of Anxiety disorders, Early Detection and Intervention Team (psychosis) "In this second volume of a much-needed handbook, the authors break ground in developing and extending perceptual control theory, showing its application to a range of fields, including health behaviours, mental health service provision, and education. A rich, in-depth, and stimulating collection of papers that are an essential resource for those interested in this cutting edge perspective on human experiencing and behaviour." -- Mick Cooper, Professor of Counselling Psychology, University of Roehampton