In the fourth Looking Glass novel, the "Vorpal Blade" is dispatched to investigate rumors of an ancient and powerful civilization that may have been the creator of the black box that drives humanity's only space ship. Any remnant technology would be nice, but what the ship finds is much more than its crew had bargained for.

Claws That Catch 2009, Baen

ISBN-13: 9781439133132

Mass-market paperback

Claws That Catch 2008, Baen

ISBN-13: 9781416555872

Unknown binding