" 'I don't believe in God, but I miss him.' So begins this book, which is a family memoir, an exchange with his brother (a philosopher), a meditation on mortality and the fear of death, a celebration of art, an argument with and about God, and a homage to the writer Jules Renard. Barnes also draws poignant portraits of the last days of his parents, recalled with great detail, affection and exasperation. Other examples he takes up include writers,...