Movie came fast in excellent conditions. I read the book from Robin Cook, one of my favorite writers and frequently and the movie was pretty much what the book was about. I think it was well done. If you like allien movies this one is out of Dr. Cook's style. He is always creating plots totally in the medical world. This time, yes there are doctors and hospitals to make easy to get some medical tools, but the story is about allien invasion. Very interesting how Cook used his wonderful medical knowledge to create a great this plot. I don't know if just seeing the movie will do since I read the book first. But it's all clear the understanding in the movie.