Clothing Crossover: Klingon Literacy Tee
Klingons have a lot of catchy sayings ("Revenge is a dish best served cold"), curses ("Your face looks like a collapsed star"), and of course that classic toast, "May your blood scream!" The literary webcomic Unshelved adds a new adage to the list with their new t-shirt, which admonishes you to either read, or immediately attack your local library with a bat'leth. It's unclear.
P.S. Don't be this guy.