If there is one kind of book you can count on finding at local used book stores, it's mass market paperback sci-fi and fantasy. You really cannot have picked a

If there is one kind of book you can count on finding at local used book stores, it's mass market paperback sci-fi and fantasy. You really cannot have picked a worse example than Asimov. 90% of the Asimov I ever read (which is quite a lot) was from local bookstores, both new and used. The trouble these days isn't finding paperback sci-fi in used bookstores, but finding used bookstores at all in the first place. They stills exist but not in the numbers they used to. If you just look up bookstores on Google maps, many of the results are coffee shops that have a single bookshelf just for the aesthetics of nominally being a bookstore. You know a real bookstore because the shelves are cheap and mismatched, with as many crammed into the space as they can manage. That's what happens if they're trying to make ends meet by buying and selling books, rather than printing money selling coffee and ambience to laptop workers.