A ranking of the greatest sci-fi movies based on books has been released, with some outlets noting that Andrei Tarkovsky's 'Stalker' has been named the greatest sci-fi film adapted from a book. However, the specific rankings and lists vary across different outlets, with some featuring broader lists of the best sci-fi movies of all time. The rankings appear to highlight a range of sci-fi movies based on books, including adaptations of notable novels.