A promise made in childhood. A lifetime shaped by letters. A story that refuses to stay buried. When eighteen-year-old Erin Walters loses her beloved grandfather, George, she expects grief, family tension, and the difficult task of saying goodbye. What she does not expect is a final letter, a hidden trunk, and a secret correspondence stretching back across decades and continents. Inside the trunk are hundreds of letters between George and Ruby Daniels, an Australian girl he first began writing to as a child in the 1930s. Their friendship grows through the Depression, war, distance, love, missed chances, and the changing shape of two very different lives. From Little Rock, Arkansas, to rural New South Wales, from wartime Europe to the quiet aftermath of loss, their words become a record of everything they could not always say aloud. As Erin begins to uncover the truth of George and Ruby's bond, she is also forced to confront her own questions about love, family, regret, and the choices that define a life. The deeper she reads, the more she begins to understand that some connections do not disappear simply because time passes. Rich with nostalgia, emotional depth, family secrets, and the enduring power of the written word, Dear Ruby is a sweeping historical and literary novel about memory, resilience, missed opportunities, and the people who remain with us long after they are gone. For readers who enjoy emotionally driven historical fiction, intergenerational family stories, wartime romance, hidden letters, and novels about the quiet moments that shape a lifetime.