Superman may be faster than a speeding bullet, but even he can't outrun copyright law. Since the dawn of the pulp hero in the 1930s, publishers and authors have fought over the privilege of making money off of comics, and the authors and artists usually have lost. Jerry Siegel and Joe Shuster, the creators of Superman, got all of $130 for the rights to the hero. In Empire of the Superheroes, Mark Cotta Vaz argues that licensing and...