After four centuries of space travel Man was supreme. Human civilisation had spread to hundreds of planets and never, never had the colonists found a trace of another intelligent species.  Humanity was alone, with the entire galaxy at their command.  And then the unthinkable happened.  An experimental ship, probing far beyond Earth’s most distant outposts discovered a new colony – and the colonists were not human.  Not only that, they believed that they were alone in the galaxy, and that all the stars were theirs to claim. Compromise – or war? Cover art by John Harris.