Voyage from Yesteryear

Invasion From Earth: Earth seemed doomed to a fiery death, so they colonized the Alpha Centauri system with children. But not everyone perished in Old Earth's War. Decades later a generation ship bearing a cargo of colonists – and an army to protect them – headed for the planet Chiron to reassert Earth's lawful control over the fledgling colony. Too bad the colonists didn't see things the same way. A deadly clash – with supermodern weapons – was inevitable as each faction sought to convert the other to the "right" way. imaginative technological extrapolation and startling scientific speculation – the stuff for which James Hogan is acclaimed – abound in this novel.