I believe that japanese books, not manga only, are read from right to left, so the right cover is a top one; so it seems that it is not really upside down...?
I own a few Japanese novels myself, so I do actually know that they are read right to left as are manga and magazines. I only came to the conclusion because of the barcode, which is standard for many book publishers to put in the bottom corner of the book instead of the top for identification, or at least on the bottom of the binding/back cover (I work for a publisher so I have firsthand experience on this), which I've also seen for Japanese books and novels and manga. At first glance that was my conclusion. Maybe the book had a half sleeve which moved the barcode up or the author just put it in a weird spot, but that was my first impression. Maybe it's not upside down, but it would have been too cute if it was (≧∀≦)
I have no idea, I've seen a few novels in Japanese only :) Maybe you are right, that would be nice xD
Btw, that thumb down is not from me! o.O
The book is not upside down. Coz when u zoom it, u can see the alphabet 'JC' is not upside down. But it is true that if the book is upside down, it would make a cute plot. And it will be a whole lot cute if the other cafe workers tease him for it!!!!!
(๑•ㅂ•)و✧
My favorite part is when he pretends to read but the book is upside down
http://www.mangago.zone/read-manga/kamatte_kawaii_hito/mf/v01/c001/21/