I always put them spine down. In my backpack or on the shelf. Since the pages on paperback books actually rest on the shelf if you put them right side up, I feel there is no danger but hardback books put the weight on the spine the whole time and I feel that it will wear out the spine and ruin the book over time.
I don't like that I don't get to see the side of the book when they are on the shelf. I have tons of books that have to be picked up to see what they are.
I don't like that I don't get to see the side of the book when they are on the shelf. I have tons of books that have to be picked up to see what they are.