"The letters of one of the greatest observers of the human species, revealing his intimate thoughts on life and work, friendship and art, medicine and society, and the richness of his relationships with friends, family and scientists over the decades. A prolific correspondent, Dr. Oliver Sacks--who describes himself variously in these pages as "a philosophical physician," "an astronomer of the inward," a "neuropathological Talmudist," and "a consummate...