Doh! - just saw that @ndesign.ie guessed that already
The Pentagon Wars…
Not Castle. Similar genre. More adult oriented.
This should be a dead giveaway. This show, takes place in Wyoming.
The main character is a cowboy sheriff, with a difference sense of the law than everyone else. He likes to read novels too.
Any other screenshots?
In case the show has made it over here?
Not main characters,(yet) but like, main set pieces / places of interest?
apart from a reading room
Is it Longmire?
It is longmire!
Is it Airplane! ?
It is Airplane!.
Train to Busan?
I was gonna guess that. but then im like i never saw that movie.