'… it is a valuable resource not only for researchers new to the area but also for those who want a sophisticated overview of both classic findings and the latest biological and methodological efforts … An encyclopedic subject index and the inclusion of a name index also make this an extremely useful reference work … an excellent book … The editors express hope that this book will stimulate researchers to devote 'even more time and resources to pursuing the causes and prevention of this enigmatic disorder'. It is hard to imagine a stimulus more likely to do so.' David A. Smith, Clinical Psychology Review