From the Book's Introduction:
Welcome to the INVULNERABLE Tabletop Super Hero Roleplaying Game! This game allows you, some dice, and a few friends, to create and narrate your own action and adventure stories, like your favorite super hero comics, movies, TV shows, novels, and video and computer games. With this game you can work together to create a team of heroes and battle nefarious villains and horrendous monsters, travel the uncharted depths of space and the strange worlds of dreams, bring hope to a world in despair and be a shining example to millions.
Super hero stories are the modern equivalent of our ancestors' ancient myths of heroes and gods battling to shape and, save the world, and now you too can take part, telling stories of heroism and struggle, seeing in your mind's eye what it is to do good and fight the good fight. And what better way to spend our leisure time than to exercise our imaginations and creativity, exploring and concentrating on noble and courageous deeds?