Aristotle's Masterpiece, also known as The Works of Aristotle, the Famous Philosopher, is a sex manual and a midwifery book that was popular in England from the early modern period through to the nineteenth century. It was first published in 1684 and written by an unknown author who falsely claimed to be Aristotle. As a consequence the author is now described as a Pseudo-Aristotle, the collective name for unidentified authors who masqueraded as Aristotle. Some claim that the book was banned in Britain until the 1960s,[2] although there was no provision in the UK for "banning" books as such. However, reputable publishers and booksellers might have been cautious about selling Aristotle's Masterpiece, at least in the wake of the 1857 Obscene Publications Act.