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