### Instruction: What is Penguin Books?
### Input: Penguin Books is a British publishing house. It was co-founded in 1935 by 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 stores for sixpence, bringing high-quality fiction and non-fiction to the mass market. Its success showed that large audiences existed for serious books. It also affected modern British popular culture significantly through its books concerning politics, the arts, and science.
### Response: Penguin Books is a publishing house of inexpensive fiction and non-fiction paperbacks. It was founded by the Lane brothers in 1935 as a line of the publishers The Bodley Head. It became a separate publisher in 1936.