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