Keep in mind that the design must read vertically.
We'd like the course cover to have a "top secret government file" look. See the image attached to this brief to get an idea.
It should definitely look like a manila folder and have "CLASSIFIED" stamped on it (not "TOP SECRET" as this would be kind of redundant). The name of the course should be prominently displayed in a typewriter-esque font (name is "SECRETS OF SUCCESSFUL SELLING).
Feel free to add your own flair. Some redacted writing on the pages sticking out the folder might look cool. "FOR YOUR EYES ONLY" could be stamped (small) somewhere.