 And once the class is over with, pass, fail, indifference, the book is gone. But now you can rent books too, even online books. You can rent a book? How do you do that? You can rent them from the library, or I like to rent online books because sometimes they'll have like 30-day rentals or 60 days, and so then it's a lot cheaper because you're not going to use it. And when you're renting a book for a class, why would you only need it for 30 days?