Book excerpt: The fourth edition of CASE STUDIES IN PSYCHOTHERAPY maintains its parallel structure with the Seventh Edition of Corsini and Wedding's CURRENT PSYCHOTHERAPIES. Cases are selected on the basis of intrinsic interest, clarity of presentation, and the extent to which each case demonstrates the basic techniques and methods of the theory being illustrated. This edition retains classic case studies by L. Bryce Boyer, Barbara Sullivan, Harold Mosak, Carl Rogers, Albert Ellis, Irvin Yalom, Arnold Lazarus, and Peggy Papp, while adding two new cases that illustrate psychodrama and experiential psychotherapy.