BattleTech Universe Series / Decision at Thunder Rift / William H. Keith, Jr.

Grayson Death Carlyle is the young son of the commander of Carlyle’s Commandos, a mercenary unit employed by the Lyran Commonwealth. When the Commandos are destroyed in a sneak attack on the planet Trell I, Grayson must help the people of Trell repel the invading forces while trying to live up to his father’s legacy and the pay back the person who killed his father.