This is one of my all-time favorite movies. It is one of the few favorite films that I list off of the top of my head when asked. Most people assume that it is based on a book, and that the book is what the grandfather reads in the film. A little bit of research and you’ll find that those people are only half right. It is based on a book of the same name, but the author, S. Morgenstern, doesn’t really exist. William Goldman wrote the book, which was published in 1973.