Brief history of the Penguin publishing house, including statement on Lolita and censorship: 

1958: Putnam publishes Lolita by Vladimir Nabakov, unleashing a storm of controversy. Banned by public libraries in some American cities—and officially banned by the government of France--the book becomes a best-seller. Along with Norman Mailer's Deer Park, published by Putnam in 1955, Lolita is a landmark victory against the threat of censorship.