Okay, the invisible tower is a stretch but bear me out here...Remember when you had huge CD towers poised like monoliths around your stereo? (Remember using the word "stereo?") Well, gradually and not so gradually those towers have been disappearing, fading into the limbo of orphan technologies. And there...is your invisible tower which is what Stephanie has condensed into one piece with multiple purposes: 1) archiving not just the covers themselves 2) but more importantly the experience of scanning your CDs or (more fun) passing judgment on someone else's collection as you spot a Tony Orlando & Dawn's Greatest Hits peeking between Miles Davis and Prokofiev. 3) Managed to recycle a raft of orphaned scraps of paper (the tray cards) and 4) sewn them up with a casual finesse. Thank you, Stephanie.