Battletech 06: Decision at Thunder Rift: The Saga of the Gray Death Legion (Bk. 6)

Battletech 06:  Decision at Thunder Rift: The Saga of the Gray Death Legion (Bk. 6) - Andrew Keith A novel set in the early days of the Battletech Universe, showing how the Gray Death mercenary legion came into being.
Grayson Death Carlyle is thrown in at the deep end of managing people, mechs and supplies as Kurita forces land on Trellwan in a staged coup, and he finds himself cut off and alone on an enemy held planet.
There's plenty of action and it moves along at a good pace.