Retirement Yenta is all about becoming more Zen and living with fewer possessions. Books have a tendency to collect on your bookshelves and then, once read, they begin to collect dust. Your dear Yenta has a new solution for you! Sell your books at www.cash4books.net or www.sellbackyourbook.com. It’s simple enough–all you have to do is type in ISBN numbers and they will give you an offer. This little Yenta says: Sell ya books, not only will you sell a book, you will make a buck!