Why do it? Well, what do you have to lose?
Time and a book, I guess.
You probably get the best worst-case-scenario ever to come out of chain letter/pyramid scheme though.
© Kaelie Nielsen Design 2013
Random, I know
P.S. If you want to start a book exchange, you could fill in the first line with the address of an elementary library, a children's hospital or a family shelter. Perhaps you might want to contact them to let them know what you're up to. You could also write in the address of a family in the area who might be in need.