This book is a collection of 43 essays by Primo Levi written between 1969 & 1985. They were originally written for publication in Levi's column of the Turin newspaper La Stampa. The subject matter is diverse, ranging from his original trade of a chemist, through many of the sciences, literature, zoology, astronomy and even a look at his home. The format of the book allows the reader to dip in and out wherever they like or to read from start to finish, either way does not diminish the enjoyment. All the essays are extremely enjoyable and thought provoking and highlight Levi's skill and erudition.