WorldCat

WorldCat is a wonderful tool to link libraries together. I have used it to complete an ILL request by finding what other libraries might have an item we do not have in our collection. I have only heard one complaint from a customer and that was because the gentleman loved being able to see inventories for libraries around the world, but he was frustrated because he wanted to just order the items and have them sent directly to his home. Still, he agreed this is a fantastic site.