I know that you're just kidding, but in all seriousness, a "Scary Stories" book would be useful as a training doc.
Most startups have a coding conventions guide for new hires -- and in my experience, it's a dry and tedious thing to study.
It would be funny and interesting to engage new programmers with animated horror stories instead of just: "Braces go on the next line...and please sanitize your data."
I think it would be fantastic to have a scary stories version. It would fit in with a slightly older audience too after they grow out of the children's book phase.