About Karl J. Friston Karl J. Friston is Wellcome Principal Fellow and Scientific Director of the Wellcome Trust Centre for Neuroimaging and a Professor at University College London. Books by Karl J. Friston The Pragmatic Turn Toward Action-Oriented Views in Cognitive Science edited by Andreas K. Engel, Karl J. Friston & Danica Kragic Principles of Brain Dynamics Global State Interactions edited by Mikhail I. Rabinovich, Karl J. Friston & Pablo Varona