This is a fascinating glimpse into the world of Dr Sacks, a neurologist, as he becomes a patient of others' care, and his reflections on his illness. He explores the neurological and physiological aspects of what's happening to himself with the eye and mind of a critical physician. Then he delves into the poetics and meaning of existence and being itself, with beautifully haunting portraits of the patient experience. He takes us on the journey from injury to initial treatment, then through rehabilitation and the newer editions are blessed with an afterword of reflections. Like all of Oliver Sacks' books, this is beautifully written prose, questioning how the mind works and what does it mean?