First Contact by Michael R. Hicks
My rating: 3 of 5 stars
Summary: Terran survey ship Aurora finds two habitable planets in an uncharted star system. But Aurora is disabled by gigantic alien warships and boarded by blue-skin females with fangs and claws. The warriors slaughter the crew in ritual one-on-one combat. The sole survivor is returned to Earth. This Messenger bears a real-time globe device that counts down to an impending attack.