The Dieya Chronicles

Across the galaxy humans are at war with a merciless enemy bent on annihilation of the human race. Created by the Human Alliance League the Dieya Corps of planetary wardens protect evolving worlds from contact with advanced civilizations. On the medieval planet of Ravar one such sentinel discovers a covert operation controlled by the human race's most deadly enemy. Cut off from outside help he must rely upon the strong swords of two of Ravar's best-known mercenaries to stop the coming invasion. Are swords cunning and human courage enough to turn the tide?