The Ultimate Guide to Sofa Beds: Sleeper Sofas, Futons, and MoreThe Indispensable Double-Agent: A Time-Honoured Tribute to the Sofa BedIn the annals of domestic utility, few pieces of furniture command such universal admiration and requirement as the humble, yet endlessly clever, Sofa Bed. It is the archetypal double-agent of the drawing-room, a ma