Robert Silverberg 
Alien Years [EPUB ebook] 

The new millennium has barely begun when a vast fleet of alien vessels descends without warning on the Earth. Some starships blaze mighty trails of fire; some pop into view, unfathomably silent. Three different but equally strange kinds of alien emerge. Wide-eyed UFOlogists who rush to welcome them are scooped up like bugs collected for study.The aliens make no response when the governments attempt to communicate with them, but a single act of resistance to them provokes massive retaliation. This is the first major catastrophe of the alien years and it will be followed by others. In silence the aliens take control of the world, effortlessly enslaving what remains of its population.On a remote California ranch, the Carmichaels are a family of blue-eyed, straight-backed patriots, flawed by narrow thinking and repressed emotions — but redeemed by their courage. With them rests the slender hope that natives of Earth may one day be free.(First published 1997)