From the publisher's website:

"They're the best there is at what they do, and what they do isn't very pretty. Go back to the grim days of the '80s and '90s, when super-vigilantes in leather and chains dispensed harsh justice. Iron Age looks at the darkest era of comic book history and how you can bring it to life in your Mutants & Masterminds game. It includes an overview of the period, how to create and run Iron Age characters and games, and details on the Iron Age of Green Ronin's award-winning Freedom City campaign setting. Iron Age is a shotgun blast of super-powered crime, betrayal, and vengeance. It ain't pretty, but someone has to clean up the streets."