"The Keeper of Lost Things" is a novel by Ruth Hogan that follows the story of Anthony Peardew, a man who collects lost objects in hopes of returning them to their rightful owners. After the death of his beloved fiancée, he dedicates his life to this mission, believing that each item holds a story and a connection to its owner. As Anthony nears the end of his life, he enlists the help of his assistant, Laura, to fulfill his promise. The narrative intertwines the lives of various characters, exploring themes of love, loss, and the significance of memories associated with lost things.