The "Manual for Physical Agents" by Karen W. Hayes is a comprehensive textbook on the subject of physical therapy agents and modalities. Covering a range of techniques from superficial heat to electrical stimulation, this revised edition provides step-by-step instructions and illustrations for proper application. The book is spiral-bound for easy use in both classroom and clinical settings, making it an essential resource for students and professionals in the field of physical therapy. With a focus on adult education and written in English, this textbook offers a detailed exploration of the physics and physiological effects of various physical agents, making it a valuable addition to any physical therapy curriculum.