If you are interested in English books, though there are some Greman and French as well I might suggest you go to Costambar (North Cost). For each book you take you need to leave one and there is no charge. After you enter through the gate, look for the yellow sign on your left they reads Maintenance Office, its next to the drug store and accross from Reys Market. Enter under that sign and you will see the books on shelves. You can also go to Bill's Books in Cabarate, they charge 70 peos's per book, but there might be a better selection. Last place would be Playa Delrado, $10.00 USD per book, and theyare not current.