silly wabbits
My friend showed me the cover and said it was in code, and showed me the page with the alphabet inside.
Hmm. Columns of color blocks, each one with a character on top. Could it be a KEY? Didn't take much effort to recognize that the cover had the same columns, just without spaces between em. I'm not bragging, but it took about, oh, maybe 3 minutes to tell my friend what the cover and the inner page said.
I didn't "crack the code." There was a key.