Using Project Gutenberg's scan of the World War II Simple Sabotage Field Manual by the US Office of Strategic Services, I created a booklet that hides the actual sabotage instructions inside flaps. The typography for the regular text and the sabotage instructions are different.
Dust cover shows a different cover to conceal the real content. The moth icon relates to one of the sabotage instructions to release moths in a movie theatre.
Two tables of contents, one hidden and showing the hidden content.
Regular content.
Hidden content with different typography.
