English names of days are weird. You have the day of the sun and the moon, ok. Fine. Then Tuesday - Friday are norse gods (Tyr, Odin, Thor, Freya), but what's Saturday doing there?! Saturn is a completely different pantheon!
In Czech we have it simple - Monday is "after Sunday", then there's Secondday, Middleday, Fourthday, Fifthday, Sabbath and Not-working-day.
Oh yes! A lot of the story beats are the same or similar, but different characters die and different survive so it's still very suspenseful even if you've seen the movie a dozen times. Speaking from experience.
The second book then goes off in a completely different direction that the movie (or rather the other way around), so that one is a great read too.
Warcraft