The two Kristin Hannah books you got are the mass market paperbacks and they are sized that way. Just be careful when you are ordering if they say "mass market paperback".
This is my first time finding your channel and you said you’re worried the wrong edition is going to come. In the US, it will have the publisher and the book’s dimensions so you can make sure you’re getting what you’re after. How that helps.
Yeah I am from Germany and when ordering from Amazon it’s always either the UK version or the US version and sometimes they show the US Cover but deliver the UK version🥲 so i definitely should remember to check the dimensions but sometimes with impulse buys I tend to forget 😂