Jack Engelhard is an American author and screenwriter, best known for his novel Indecent Proposal, which was published in 1988. The book explores themes of love, morality, and the complexities of relationships, and it gained significant attention when it was adapted into a film in 1993, starring Robert Redford and Demi Moore. In addition to his fiction work, Engelhard has written extensively for various publications and has been involved in the world of journalism. His writing often reflects his views on contemporary issues, and he has a reputation for being a provocative commentator on social and political matters.