Has anyone ever read the novel The Bodysnatchers? That's what they say this movie is based on and I am considering reading it if I can find it. I'm guessing that type of book would be considered Sci-fi/Horror. That's what the movie is pretty much. I thought that The Invasion was also a movie that kept my interest, but then again don't all thrillers? Nicole Kidman most definitely played her part in this movie as always and the special effects made the people in affect of having their emotional expressions taken away from them in their sleep look especially gross. I would recommend this movie to thriller lovers because it's really not that much of a horror movie. If it were I most definitely would not have watched it.