premise: Penguin Books revolutionized publishing in the 1920s.
hypothesis: Penguin Books . It was founded in 1935 by Sir Allen Lane as a line of the publishers The Bodley Head , only becoming a separate company the following year . Penguin revolutionised publishing in the 1930s through its inexpensive paperbacks , sold through Woolworths and other high street stores for sixpence , bringing high-quality paperback fiction and non-fiction to the mass market .