The Clay family has one last desperate plan to save the Tyr. Sarah leads an infiltration team of Tyr deep behind the invader’s lines, but can she trust the Hidden caste operatives with her? David carries the device that could sever the planet from the threat of Director Zike, while Tyr traitors are on his trail and will stop at nothing to obey their new masters and to exact revenge against General Fastal. As the Tyr fight for survival, secrets will be revealed with implications for the galaxy far beyond what happens on their world. The Tyr: Defiance is the third and final book in the series. Listen to the explosive conclusion to this first contact series and brace yourself for twists and turns that will keep you on the edge of your seat.