I remember reading them back in the early 90s (Robin Hood: Prince of Thieves, Far and Away, Back to the Future). They don’t seem to be a thing anymore (or am I just not noticing them).
As an aside I remember liking them but I was a preteen at the time so maybe they were terrible and I just liked the movies.
The X-files has a novelization of the movie (I have it of course) and there was a series of YA books that were episode novelizations. I don’t remember all the titles they did but I know one was Eve.