Books in Star Trek: Klingon Empire series

Captain Klag, commander of the I.K.S. Gorkon, becomes caught in the middle of an impending conflict between the Klingon Empire and the Elabrej, a mysterious alien civilization, after an unexpected skirmish between the Gorkon's brother ship, the I.K.S. Kravokh, and an alien vessel. Original.

When Captain Klag and the crew of the Gorkon venture into the unexplored Kavrot Sector, they stumble upon a strange planet populated by the Children of San-Tarah, a powerful warrior culture, who offer Klag a challenge he cannot refuse--a series of martial contests whose winner could transform the Klingon Empire. Original.