Don't touch the piles
Once upon a time you entered a bookstore where books were in piles. Not a Barnes & Nobel organized piles, but some random piles like a perfect play for hide and seek. Of course, only if you like playing hide and seek with random books.
Among the piles, you will find treasures. But hussss... don't touch the piles unless you have a well-defined insurance that covers book piles related accidents.