The Agent 13 sourcebook for Top Secret S.I. allows you to play in the exciting pulp fiction world of the 1930's. Play as adventurous G-men tracking dangerous gangsters, or masked crimefighters dealing out vigilante justice on the mean streets. Rescue gorgeous dames from the clutches of mad scientists. The Agent 13 sourcebook contains everything you will need to run a 1930's adventure, just don't forget your Tommy Gun. ...