The sleeping-sickness epidemic of 1918 caused hundreds of survivors to slip into a bizarre rigid paralysis with similarities to advanced Parkinson's disease. These patients, only occasionally able to communicate or move, were nearly all institutionalized for life, their ranks increasing every now and then with similarly afflicted men and women. Sacks came to work at a long-term care facility shortly before the first exciting results with L-dopa and Parkinson's in the late 1960s; his patients soon embarked on dramatic, difficult recoveries from up to 50 years of torpor. He documents their spiritual and medical obstacles with great care to portray their individual personalities, long suppressed but finally released. Though many great doctors are also great writers, few can compare with Oliver Sacks for expressing the relation of medicine to the human spirit. --Rob Lightner