The book was poorly written, pretentious and so bad it actually made me angry. The hype and fellow author reviews were totally undeserved and basically total falsehoods. It was a sound premise very poorly executed. Thankfully I paid 39p for it online, if I'd paid the full cover price, I would have tracked the author down and demanded my money back. This movie however is very, very good. Mr Mass Email (not a typo) has had a HUGE hand in this - probably sat next to the books author and showed him how to construct a gripping tale with clever social commentary and even a somewhat open ending which is satisfying - admittedly that last thing is hard to do in a novel. The cast are outstanding, Julia Roberts is unlikeable - how hard is it for her to make that work? I love her, always have, but at times I was glaring at her! It is a slow burn but if you can immerse yourself in it, it is well worth it. The set pieces - some of which are from the book so kudos for that - are very well played. The overall feeling of menace and doom is constant, it is gripping, it is terrifying.
You're going to need to pay attention and think, judging by a lot of the reviews here a lot of people cannot do that and just want whoosh...aliens..bad guys...BANG!!
If you haven't read all the light you cannot see you will think the TV show is great but those of us who have read the book know it's fine, but falls well short of the written version. The opposite of this show is so true, a terrible book becomes a brilliant movie. Well done Sam.