This is a personal anthology in which Levi presents the writings that shaped him, with his own commentary. He chooses passages from authors such as Job, Rabelais, Thomas Mann, Conrad, Celan and scientific writers, grouping them by themes like pain, laughter and the wonder of the natural world. The commentary explains why each piece mattered to him. The book works as a kind of intellectual self-portrait, showing the range of Levi's reading and how science and literature joined in his thinking.