Sacks, called the poet laureate of medicine, puts pen to paper in these four brief essays in which he explores his impending death and his long, fruitful life.  His Orthodox Jewish upbringing, his gay identity and his alienation from his family, his writing and medical career, his interest in the periodic table and its elements, and mostly the feeling that he has lived a ‘good enough’ life as he faces its inevitable but too looming reality.  Another fine addition to the literature of aging and death.