Shopping Bop

My mother is eighty five years old and lives in the country where there is not a lot of activity going on.  She loves to read all types of books and told me the other day about a special store she found that has half priced books for sale.  She recently purchased five books to read and when she finishes reading one she returns it and they give her a discount on the next book she buys.  I told her this sounded like a really good deal and helps other people who like to read as well.  She said she is going to collect all her old books and donate them to the store.