I’ve gotten used to reading books in Japanese, which most of them are typically B6 or in some cases A7, it’s easier to store them on bookshelves due to the smaller size. I also collect books in English, why can’t they be more of like a novel that is easier to carry instead of being A4 or A5.

Also, Japanese books and manga are read from right to left with the text being formatted vertically on top of that, as opposed to English books where the text is horizontal and read the standard left to right. Can a book written in English be published using B6? I mean, would it work?