Downton Abbey by Julian Fellowes

Set in a grand Yorkshire country house in the early 20th century, the novel follows the aristocratic Crawley family and their domestic staff as they confront an inheritance crisis after a maritime disaster, forcing questions about succession and the survival of the estate. Against the backdrop of social change, romantic entanglements, secrets and the First World War, the intertwined lives upstairs and downstairs reveal shifting loyalties, ambitions and the tensions between tradition and modernity.