If you ARE an affiliate, you can use your personal links with your affiliate ID to make sure you get credit for all sales (note, your shop page and all your lists are affiliate links too!) Affiliate links to a specific book are constructed like this: https://bookshop.org/a/YOURAFFILIATEID#/ISBN13If you don’t know your affiliate ID or an ISBN, no worries! Log in to your account, search for the book, and scroll down on the page. You’ll see your affiliate link about ½ way down the product page, like this:

If you’re NOT an affiliate, and you know the book’s ISBN, use the format: https://bookshop.org/book/ISBN13 to link to any book. If you don’t know the ISBN, just search for the title on Bookshop.org and once you’re on the book’s page, copy the URL from the search bar.