Since your account will have multiple libraries in it, think of it as a master account that saves you time. (tomsguide.com)
Library ELF also gives families the ability to check the status of items from multiple library cards in one place, which will help cardholders avoid overdue fines and better organize library trips by knowing they have a complete list of all items due. (warwicklibrary.org)
One of the advantages with the Libby app is you can sign into multiple libraries using multiple cards, and the same library with different cards, and manage all your books and audiobooks in one place. (blog.the-ebook-reader.com)