The first person to find it will get a free, personalized drawing of any Sheldon character(s) they want!

Here's how to play:

1.) Search the Sheldon archives to find the red square, seen above. The square will be located inside an actual strip. Specifically, in one of the daily, black-and-white, Monday-Saturday strips.

2.) Once you've found it, drop me a line to tell me the date of the mystery strip!

3.) IMPORTANT! Don't say or share the date publicly in the forum...just e-mail me. I want to keep it fun for everyone else who hasn't found it yet.

4.) I'll announce the winner on or just after Monday, Nov. 19th. And of course, I'll be sure to show a picture of their prize illustration shortly after that!

THE PRIZE: Will be a one-foot-by-one-foot illusration, drawn on acid-free Bristol vellum paper, using archival, lightfast inks. You can be assured it's gonna be rad, and will be well worth the effort. (And remember: you'll get to pick the characters and text you want in your drawing!)

Ladies and gentlemen...start your engines! And remember, half the fun here is re-reading some of your favorites!