Type backwards books into instragram or pintrest and you will see it is a trend.
It allows monochrome colour.
Or you could write on the part facing you.
It means do not judge book by cover.
Some libraries / book shops have recently turned round all books by men.
Or is it a new trend could it be a retro move going back to the beginning of books?
Before there were books there were scrolls and they did not have a spine. Then when books started it was monks that had them and they did not display spine out.
What do you think about displaying books with spine in?