Sure. This appears at the end of Cover 2: Harbinger...
UPDATE: April 19, 2017, 2000 EDT: As you see below, this post spurred a new interest in solving the unsolved puzzles. In the process it was discovered that the "Intervene" puzzle was in fact unsolvable! The intent of the puzzle had been to demonstrate the relationship between Rulebook Code color and position of a character in a given flavor text, but due to a juxtaposition in notes, the flavor text Hayward believed was on Mega-Computer was in fact on Micro-Targeting Computer.
Reading that flavor text, the solution is obvious: I is brown meaning 6, N is gray (7), T is green (9), E is yellow (1), R is orange (4), V is blue (2)...and those numbers are the positions of those letters in that flavor text.
Yr. Hmbl. believes that had the flavor text been matched properly, this puzzle might have been solved at this time and shown as further proof that mackcrockett was on the right track. At the same time, it's possible that because the connection between flavor text and Rulebook Code position was clear, it might have been skipped over. If so, it almost certainly would have been discovered during "Break Time."