Like many young boys, and a growing number of girls, Sam Clay grew up fantasizing about doing great things. Super great things. As one of the two title characters in Michael Chabon's novel "The Amazing Adventures of Kavalier & Clay," 17-year-old Sam "dreamed the usual Brooklyn dreams of flight and transformation and escape." His dreams ultimately would come true, more or less, through the World War II-era comic-book superheroes he would create with his cousin, Josef Kavalier. But long before then, Sam's major form of escape came through his active imagination. "He had devoted an embarrassing number of hours of mute concentration – brow furrowed, breath held – to the development of his brain's latent powers of telepathy and mind control," Chabon wrote.