What a mess of a book. Story lurches from one scene to the next and characters and scenes change in the space of a sentence. Things happen with no explanation prior or afterwards.
Basic story consists of a bunch of cookie cutter Characters standing round asking each other if they're a monster or accusing the others of being a monster after they dig up an alien on Antartica. How anyone made sense enough of this story as it is written to go on to think it was worth making a movie out of is remarkable.