A civilization-destroying Omega cloud has switched direction, heading straight for a previously unexplored planetary system - and its alien society.
A handful of brave humans must try to save an entire world ... without revealing their existence.
Read MoreA story rich in detail and filled with action ... This taut tale of SF suspense belongs in most collections - Library JournalMcDevitt honors the memory of his predecessors by writing up to their level - SciFi .comMcDevitt handles the back story so adroitly that readers unfamiliar with earlier volumes in this series should have no trouble following the action - The New York Times Book Review