In the first picture, you're holding the book upside down. The book is perpendicular to the floor and parallel to your face. I think it is correct to say "you're holding the book upside-down".
But suppose that you do the same thing but this time the book is parallel to the floor and perpendicular to your face.
Is it still correct to say "you're holding the book upside-down, turn it right-side up"?
or maybe "you're holding the book frontside-back, turn it right-side front"?