The Invisible Library
There is a website called The Invisible Library -- http://www.invisiblelibrary.com -- which lists books which don't actually exist, but whose titles appear in other books. It lists the author and title of the real books they appear in, as well as the "author" and "title" of the imaginary book. It's a fascinating site, but there is not one entry for Gene Wolfe.
Obviously, this can't go on. There's The Book of Gold, The Lusty Lawyer by Amanda Ros from Peace (and wasn't there another book by her as well?) and everything in Bibliomen (my copy of which is not accessible at the moment, unfortunately); and there must be others. Should we make it a group project? I'm willing to act as clearinghouse, if people don't want to clutter up the list.
--Adam