The success of "The Collector" meant that Fowles could stop teaching and devote himself full-time to a literary career. Film rights to the book were optioned and it was adapted as a feature film of the same name in 1965. Against the advice of his publisher, Fowles insisted that his second published book be "The Aristos", a non-fiction collection of philosophy essays. Afterward, he set about collating all the drafts he had written of what would become his most studied work, "The Magus".