LitHub — In the early 1930s, a bookshop window would have displayed the pretty, pictorial dust jackets of the latest bestsellers, say Dashiell Hammett’s The Maltese Falcon and Pearl S. Buck’s The Good Earth. A compact wooden bookshelf stuffed with colorful paperbacks might also have commanded space and attention, its slightly off-kilter sign in all caps reading: 50¢ BONIBOOKS...