Handbook of Sleep Disorders (Neurological Disease and Therapy Series 6) ($198, 920 pp., 1990) is published by Marcel Dekker, New York. It is essentially an American book (with 24 out of 36 chapters originating from North America) with a distinctly American point of view. The book has been edited by Professor M. J. Thorpy, the Chairman of the Diagnostic Classification Steering Committee of the American Sleep Disorders Association. Professor Thorpy is also Director of the well known Sleep-Disorders Center, Montefiore Medical Center, New York.