The Discordian Coloring Book.

Neatorama reader yawfren pointed out that the recent hubbub over Eris the dwarf planet (used to be called Xena), is a great intro to Eris the goddess of chaos, which is the goddess of Discordianism [wiki].

What is Discordianism? Wikipedia explains it as:

a modern, chaos-based religion founded in either 1958 or 1959. It has been described as both an elaborate joke disguised as a religion, and as a religion disguised as an elaborate joke. Some of its followers make the claim that it is "a religion disguised as a joke disguised as a religion"

And what good is a pseudo-religion if it doesn't have coloring books?

Laramie Sasseville's Discordian Coloring Book | Principia Discordia [wiki] | See also: Church of the Subgenius [wiki] - Thanks yawfren!