Where the author has done no research. I'm looking at you Tom Clancy.
I attempted to read 'Patriot games'.
- no bakeries are not open Xmas morning with people forming a 'line'
- I doubt you could catch a ferry on Xmas day in the 1980s, you certainly wouldn't be transferring a prisoner
- no you don't get pushed out of a London hospital in a wheelchair because the 'rules are the same' as in the US
4 no her maj and prince Philip are not going to take care of your little girl while you are in hospital.
I stopped at that point.
@SchoolTripDrama
When you are reading the fourth book in a series and the book explains something in detail that happened in book one, and was also explained in detail in books two and three.
Just put a hint for new readers, like, "she remembered a similar situation x years ago" Any new readers can go back to book one, those f us that stuck with you already know what happened.
Then in book five it is again described in detail but a different thing is described.
Sequels that contradict the other books, I first noticed this when I read Heidi. Well when I read the sequel and her her had changed colour from brown to blond.