Reading my original post, perhaps I should have made the important point
more clear.
My question is about an ILS suitable for a library that does not own its
books, but is borrowing those books from patrons. The books all have lease
end dates associated with them. Book lenders are very similar
I don't know about an ILS that would do this, but there used to be an
open-source software package called The Distributed Library Project that was
geared toward this kind of sharing model. Alas, I can't find any downloads
of the software online anymore, but I did find two instances of it running: