I was reading an article about paying attention (hilarious, I know), and stumbled upon a word I'd never seen before: enchiridion.
I quickly googled it (because what else would you do in this day and age), and it means, "a book containing essential information on a subject."
Fascinating. Pronounced, "en-kah-rid-ee-on."
Just goes to show, learn something new everyday. Thought I'd share that little tidbit of knowledge with you all. :)