This is the first complete English translation of Westphal's 'Die Agoraphobie', the classic paper which introduced the term agoraphobia. The case histories contained in 'Die Agoraphobie' are the first systematic descriptions of the signs and symptoms which constitute agoraphobia. Regarded as a 'classic' in the history of differential diagnoses, Westphal's paper continues to be widely cited. The translation is accompanied by an extensive introductory commentary describing Westphal's career, professional reactions to 'Die Agoraphobie', the contrast between Freud and Westphal's view of agoraphobia, and the current status of its treatment. This book will be of interest to all those suffering from agoraphobia, mental health professionals, and students of abnormal psychology and psychopathology.