J. Mark G. Williams, DPhil, is Emeritus Professor of Clinical Psychology at the University of Oxford, where he was Wellcome Principal Research Fellow from 2003 to 2012. He collaborated with John Teasdale and Zindel Segal in developing mindfulness-based cognitive therapy (MBCT) to prevent relapse and recurrence in major depression; together, they coauthored Mindfulness-Based Cognitive Therapy for Depression (now in its second edition), The Mindful Way Workbook, and (with Jon Kabat-Zinn), The Mindful Way through Depression. Dr. Williams is a Fellow of the Academy of Medical Sciences and the Brit...