Merging biography, memoir, and cultural history, this compelling book, a bestseller in France, traces the life of Dora Maar (1907–1997) through a serendipitous encounter with the artist’s address book. In search of a replacement for his lost Hermès agenda, Brigitte Benkemoun’s husband buys a vintage diary on eBay. When it arrives, she opens it and finds inside private notes dating back to 1951—twenty pages of phone numbers and addresses for Balthus, Brassaï, André Breton, Jean Cocteau, Paul Éluard, Leonor Fini, Jacqueline Lamba, and other artistic luminaries of the European avant-garde.