When aliens invade, a generations-long struggle begins against an impenetrable enemy in this sci-fi epic from the Hugo and Nebula Award–winning author. The Entities have arrived on Earth, fifteen feet tall with impenetrable defenses and inscrutable motives. As conquerors, they have no demands, no explanations, simply harsh consequences should they be challenged. Releasing a plague and plunging the world into a new Dark Age, the Entities seem unbeatable. But, one family at least—the Carmichael clan led by Colonel Anson Carmichael—will never give up the resistance. THE ALIEN YEARS is an epic story told over multiple generations by master of thoughtful science fiction Robert Silverberg. Can ideas of freedom survive in the face of an overwhelmingly powerful enemy?