To Have and Have Not has the distinction of being the only movie based on a novel by a Nobel Prize winner--Ernest Hemingway--to have a screenplay [co]written by another Nobel Prize winner--William Faulkner. Faulkner enjoyed working with Bogart; he later wrote the screenplay for The Big Sleep. In addition, he worked, uncredited, on Gunga Din and Mildred Pierce, among other films.
In 1956, when The Paris Review asked the writer whether he would like to make another movie, here's how he answered:
Yes, I would like to make one of George Orwell's 1984. I have an idea for an ending which would prove the thesis I'm always hammering at: that man is indestructible because of his simple will to freedom.Criminy--wonder what it was? Can you imagine? The mind reels.