Oliver Sacks has been described (by "The New York Times Book Review") as "one of the great clinical writers of the 20th century," and his books, including the medical classics Migraine and Awakenings, have been widely praised by critics from W. H. Auden to Harold Pinter to Doris Lessing. In his last book, "The Man Who Mistook His Wife For A Hat", Dr. Sacks undertook a fascinating journey into the world of the neurologically impaired, an exploration that Noel Perrin in the "Chicago Sun-Times" called "wise, compassionate, and very literate...the kind that restore(s) one's faith in humanity."Now ...