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.
I recently read Jeff Strand’s novelization of Attack of the Killer Tomatoes. The book is hilarious as the author pokes fun at some of the dumb scenes in the movie.
There’s also a novelization of Ghostbusters. I haven’t read that one yet.