The 1967 publication resulting from a study of nudism begun in 1964. The authors administered a six-page questionnaire and the Minnesota Multiphasic Personality Inventory to over 400 nudists, attended nudist functions, and exposed non-nudist friends and colleagues to nudism. Author Donald Johnson was a nudist; Hartman and Fithian were not nudists but seem very supportive. The book is illustrated with black and white photographs from nudist publications, whose captions are apposite but not scholarly.