We do plan to add a feature where members can add their own books to the Library, whether they have ISBNs or not. We are finding on importing the requested books to the Library (a mammoth task with 11,000 still to go) that many books have no information listed on Nielsen, Amazon or WorldCat. So we can't enter the books if all we have is ISBN numbers. Once we have completed the import we will be going back to the requesters of these books, asking them to import the book details themselves.