This Art Speaks to Me...

or I wish someone would speak to me about this art. Where did it come from? Who are the artists? What does it mean? I just noticed this at the corner of the library on the patio a couple of days ago.

Some theories are as follows...
Bill Huber: It's a tribute to the internet and how information travels through the "tubes"...
Me and Rita talking: Maybe it's a tribute to interlibrary loan and how books are sent from one place to another...
Me thinking to myself: Maybe since it is furnace ductwork, it's some sort of Fahrenheit 451 censorship statement!

What's your theory? It's very interesting and has created discussion here. Artists, come forward!