This book is amongst the first of its kind in presenting a case study of voyeurism from a forensic psychology perspective and within the societal context.Simon Duff provides an in-depth description of the assessment, formulation, and treatment of a voyeur and offers a theoretical basis for the behaviour.The book begins by covering a variety of explanations and previous treatments for voyeurs, including learning theories and the aversive treatments that they give rise to.It then moves on to focus on one specific case study, a young man who has exhibited diversity in his voyeuristic offending, before examining relevant details of his experiences in order to develop a formulation of his thinking and behaviour.The formulation and resultant intervention are clearly and accessibly presented, followed by a discussion of how this case provides direction for further research, developments in our theoretical basis for understanding voyeurism, and directions for assessment andintervention.