Sofa Bed Buying Guide: Sleeper Sofas, Futons, and Convertible OptionsThe Indispensable Double-Agent: A Time-Honoured Salute to the Sofa BedIn the history of domestic utility, few pieces of furniture command such universal admiration and requirement as the humble, yet endlessly clever, Sofa Bed. It is the perfect double-agent of the drawing-room, a