Book excerpt: The beginning of the nine-part "Millennium Giants," featuring interconnecting covers and a storyline that affects the Superman titles, AQUAMAN, CHALLENGERS OF THE UNKNOWN, SUPERGIRL, STEEL and TEEN TITANS! They're as old as the Earth itself and at least two city-stomping-monsters tall! The Millennium Giants have come to cleanse and renew the worldÉby destroying everything on it! Two Supermen go up against this truly enormous menace, but do even they have enough power?