Armageddon Sky (Star Trek Deep Space Nine: Day of Honor, Book 2)

Worf and the crew of the Defiant find themselves trapped on an alien world threatened by a global cataclysm, while Captain Sisko must keep tensions on Deep Space Nine from erupting into warfare. Original.

All Klingons revere the Day of Honor, their most sacred holiday, but the true nature of honor can be a matter worth fighting over.... Dispatched on a secret mission to investigate the raids, Commander Worf of Deep Space Nine and the crew of the Defiant find themselves trapped on a an alien world threatened by global cataclysm -- trapped along with Klingons who were exiled to this world for their loyalty to Worf's dishonored family. Worf must find a way to save the Klingons whose honor bade them to keep their pledges to the House of Mogh despite the orders of the Emperor, and to prevent a bloody massacre that will forever stain the honor of the Klingon Empire!