Completed shortly before his death, this profoundly fascinating, illuminating work from bestselling thinker and neurologist Oliver Sacks provides readers with a compelling and rare gift.      The River of Consciousness reflects Oliver Sacks at his wisest and most humane, as he examines some of the human animal's most remarkable faculties: memory, creativity, consciousness, and our present, ongoing evolution.      Before his death, Sacks personally collected into this one volu