Depends heavily on your topic: There are many situations where all bookstores, even Amazon, will come up short. Studying history, for instance, it's amazing how

Depends heavily on your topic: There are many situations where all bookstores, even Amazon, will come up short. Studying history, for instance, it's amazing how often the main branch of my local library has books even third party sellers in Amazon won't offer, or where they'll demand outrageous prices. Still, for availability, the real winner is the not-necessarily-legal archives where you can find, say, OOP foreign books that I'd have to cross an ocean to find in a library.