Looking for a Bookstore on Block Island? Island Bound, next to the Block Island Post Office, is a great place to find a good read for the beach. The Book Nook, is in the Seaside Building on water street. Look for the alley way sign.
Both Stores have a good selection and can special order anything you want. There are several island authors as well as national authors that hold signings at these island locations.
If you're looking for Magazines, head up to the Block Island Health & General store on High Street. Islanders still refer to it as 'the Pharmacy' although there is no longer a pharmacy there. They have a good selection of Magazines and DVD rentals.