Done

The books are now back in order and the floor is clear.  We have two large boxes of spares and 'why the hell are we keeping this?' and 15 feet of clear shelf.  Next task is to start at Z and work backwards cataloging the lot into library thing while loosening the stacks again and then comparing the new and old catalogs checking for missing.

update.  Just found another pile of hardbacks behind a chair in the bedroom, that's another three foot of shelf filled once I move everything up so they can fit in.