You are able to add any book you find on the site to a wishlist on each individual item's product page:

Once you've added books to your desired wishlist, you'll be able to personalize those wishlists from your user account:

From this view, you can create new wishlists or copy their links to share with anyone. 

Before you can share the link to your wishlist, you'll want to first ensure that the wishlist's privacy setting is made public:

As of August 2022, is proud to announce Registry Mode for wishlists. Learn more here.