If I had never read "The Man who Mistook his Wife for a Hat" before this book (both by the same author), I would have rated this as a five-star classic. Though as well written as the other work, this book presents his studies in a less humane, and more scientific way. Read the other work and one will sense the noticeable difference in the way that Dr. Sacks approached his patients. When reading the "Awakenings", I felt as a detached bystander looking through the windows of his clinic and observing the patients. When reading "The Man who Mistook his Wife for a Hat", I was so engaged by Dr. Sacks vivid descriptions of the patients, physically, intellectually, emotionally and spiritually, that it was as if I was face-to-face with the patients, and that I was connected in some intrinsic way to each and every one of them. Please please read the other work as well as this one.