There are 21 contributors to the 26 chapters of this book. Because many chapters have apparently been presented originally as papers, it is advantageous that many of the chapters have summaries or conclusions. Some techniques are more historical than current, and in some instances they are not clearly explained. Each chapter includes a good list of primarily current references. Fifteen chapters are devoted to irradiation, five to physical modalities of electricity (iontophoresis, galvanic surgery, epilation, electrocautery, and electrosurgery), two to phototherapy, and one each to lasers, plasma torch, ultrasound, and cryosurgery. In all, 184 pages are concerned with ionizing radiation, whereas only 97 pages deal with nonionizing therapy modalities. The nonionizing modalities have been neglected in the dermatologic literature, and their inclusion serves a great purpose to the student, resident, practitioner, and researcher in dermatology. Because of this neglect, however, these facets of therapy should have been more thoroughly discussed,