The Invisible Library “is a collection of books that only appear in other books. Within the library’s catalog you will find imaginary books, pseudobiblia, artifictions, fabled tomes, libris phantastica, and all manner of books unwritten, unread, unpublished, and unfound.”
For example, anyone remember what the author Gordon Lachance wrote? Or Jo March? Or who wrote Fighting Sailor? Or There and Back Again? Do you own any books by Gilderoy Lockhart?
An intriguing site. Thanks to Veronica for the link.