PetaPixel:

Before clicking the Checkout button on Amazon or other online bookstores, you might want to check out the handy browser extension called Library Extension. It adds a box to Amazon book listings to show you if that book is available for free at your local library.

The extension is available for Chrome and Firefox, and both versions have near-perfect reviews.

Once it’s installed, you’ll see the new Library Extension icon in your toolbar. Click it to choose which libraries the tool should look for books in.

Now you’re all set. Whenever you view a book’s listing on Amazon, a new box will appear on the right side above the buying options box. This will show you how many copies of that book each of your chosen libraries have on file and how many are available to borrow. Clicking the link takes you to the library’s book listing.

My small local library isn’t included but if yours is (you can check here), then this extension might come in handy.