To slightly
extend the above
description, the
consequence of
L-Space is that all
libraries and
book stores are, in some way,
connected. The
librarian of
Unseen University knows how to
navigate this "multi-bookstore", and can hence reach any library in the
multiverse simply by taking the right turns in the
back alleys of his own
library.
L-Space is also the name of a website dedicated to Terry Pratchett, mirrored all over the world. It can be found at www.lspace.org, and contains limitless information.