You may have noticed that there is a new hyperlink protocol for books: logosres:. Obviously this means that if you want you can have Libronixdls links point to L3 and have logosres point to L4. But the really neat thing is now when you have a logosres hyperlink in a note file it gives you a preview window. Go ahead, check it out.
(Apologies if someone's already noticed this before)