Angelmass

Hugo winner Zahn (Conquerors' Legacy and numerous Star Wars novels) offers a satisfyingly complicated story of an alien force, Angelmass, that has for decades been spewing off particles called Angels, which have power over human behavior. Angelmass has become a significant part of the governing structure of one interplanetary system, the Empyrean, and a source of concern for its legendary enemy, the Pax Comitus...