John Cleland's Memoirs of Fanny Hill

Memoirs of a Woman of Pleasure (popularly known as Fanny Hill) is an erotic novel by John Cleland first published in England in 1748. Written while the author was in debtor's prison in London, it is considered "the first original English prose pornography, and the first pornography to use the form of the novel." One of the most prosecuted and banned books in history, it has become a synonym for obscenity

John Cleland (baptised 24 September 1709 – 23 January 1789) was an English novelist most famous and infamous as the author of Fanny Hill: or, the Memoirs of a Woman of Pleasure.
-Wikipedia.com