Omega by Jack McDevitt [FIRST PAPERBACK PRINTING] 2003

Omega by Jack McDevitt [The Academy IV] FIRST PAPERBACK PRINTING [2003] ACE SCIENCE FICTION Book is in excellent condition.  Light shelf wear and tanning to pages. Reads like new. A civilization-destroying omega cloud has switched direction, heading straight for a previously unexplored planetary system--and its alien society. And suddenly, a handful of brave humans must try to save an entire world--without revealing their existence.