Despite their status as intellectual giants of the twentieth century, John Berger and Susan Sontag's artistic collaboration - and intense friendship - remains virtually unknown. Published for the first time, To Tell a Story offers a glimpse into their shared history that spanned nearly a quarter-century. From sources such as their eponymous film broadcast, rare personal letters and archival recordings, the composite fragments build a portrait of a relationship that was often lively and challenging, sometimes trivial and always affectionate. Berger and Sontag's voices echo throughout these pages, riffing off the other as they grapple with their respective concerns. Above all, their conversations reveal a deep reciprocal admiration and an exchange of ideas about storytelling, the self and society that informed their own work.