The director of Back to the Future directed another movie in 1994 which was based on a book. Who was the author of the book?
Robert Zemeckis:  Credited as "one of the greatest visual storytellers in filmmaking", he first came to public attention in the 1980s as the director of "Romancing the Stone" (1984) and the science-fiction comedy "Back to the Future" film trilogy, as well as the live-action/animated comedy "Who Framed Roger Rabbit" (1988).
i don't know