Book excerpt: Imagine, for a moment, that you live in a world full of superheroes. Imagine a world where people bend steel in their bare hands, where champions dart across the sky, where avengers step out of the shadows to protect the innocent. Imagine a man larger than life protecting the innocent, imagine a family of heroes, imagine warriors dedicated to the safety of mankind. Imagine you've worshiped them your entire life. Then imagine it's all a hoax. Imagine that your champions are actors, the fights choreographed... imagine the real heroes vanished a decade ago. Imagine you're the only one who knows the truth. And imagine what you would do to put things right...