The product is a hardback book titled "Letters by Oliver Sacks" written by Oliver Sacks and published by Alfred A. Knopf. It has 736 pages and is written in English. The book measures 23.5 cm in length, 15.6 cm in width, and 3 cm in height, weighing 0.73 kg.

The product is a hardback book titled "Letters by Oliver Sacks" written by Oliver Sacks and published by Alfred A. Knopf. It has 736 pages and is written in English. The book measures 23.5 cm in length, 15.6 cm in width, and 3 cm in height, weighing 0.73 kg.