It was a movie first.
yes
Crispin Glover as an older George McFly.
yes it is technically
There are novelizations. These are different to the films, however.
book
the book
a book
back to the future
Gray's Sports Almanac
Movie.
no there is only a movie 4 the first book
I do not know of a movie of that name but I do have the book written by T.H.White wonderful story.