All three releases in the series: [One](https://www.discogs.com/release/872), [Two](https://www.discogs.com/release/873) & [Three](https://www.discogs.com/release/874) has a 6 on spine so the three together form 666. There is also a little picture on flap of every release in this set and when these little pictures are put in a vertical line it reveals a one big picture of a fork.