Isaac Asimov, Arthur C. Clarke, Ray Bradbury and many others who are now gone were the big writers of the day when I was a kid(even if like Dr. Asimov they switched to non fiction in the 50's). There were plenty of old paperbacks to read with their work in them. Now of course a lot of them are in ebook formats. Sometimes I could find a good read to buy for .25 at a local garage sale back then. Someone would always seem to have a box of old books in their sales.