1003
xkcd #2869: Puzzles
(imgs.xkcd.com)
Alt text:
Why couldn't the amulet have been hidden by Aunt Alice, who understands modern key exchange algorithms?
but other people read them too and didn't go absolutely nuts
It's all about the margins. It's a deep library conspiracy. I read about it from some dude named F on Tumblr. Do your own research.