To add a resource from your existing bookmarks you can use the action bar and click Add Resource or click on the action menu of an item to add a resource below.
Search by author, title, keyword or ISBN - in this example, the search results show all resources that had been previously bookmarked by the user that contain the keyword subculture.
This is a recently added feature to the beta edit interface.
Search for a book by author, title, ISBN or keyword and in addition to your existing bookmarks, there will be a look-up to check whether the book is available on Library Search or would need to be purchased for the collection. You can add the book to your list from within the reading list system without having to go to Library Search or amazon to add a title.
When a book is added that is not in the library collections, it will display in your list as unavailable. When you publish the list, the Library will be automatically notified and will purchase items that are not in the collection.