I don't want to be too generalizing, but I found the book to be matching a lot of American cultural stereotypes (as I have experienced them) and most of it would just seem corny (but not terrible) to most people from European countries (less in the south or UK maybe).

Like, I don't even disagree with what he wrote, but most of the stuff just felt a little out of place and intruding on people who generally want to be left alone or keep it to small talk on a different level.