Yes, absolutely. The difference between a lock and a book though, is that the lock primarily has some ongoing functional purpose. Generally with books, they are

Yes, absolutely. The difference between a lock and a book though, is that the lock primarily has some ongoing functional purpose. Generally with books, they are consumed (non-destructively), and then their value is drastically diminished to the owner, leading them to resell them. I get to keep all the great memories of the book that I read even after I sell it, but I probably will not think back to all the times I locked and unlocked my door.