Penguin Books is a British publishing house. It was co-founded in 1935 by Sir Allen Lane with his brothers Richard and John, 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. Penguin's success demonstrated that large audiences existed for serious books. Penguin also had a significant impact on public debate in Britain, through its books on culture, politics, the arts, and science.