The Reaper Plague: Plague Wars Series, Book 7

Colonel Muzik and Master Sergeant Repeth fight a life-and-death battle to return civilization to the nuked and plague-ridden nation's capital. With a homicidal alien spacecraft inbound at high speed, Skull and Raphaela fly to meet it in a desperate bid to buy time for the Earth. In the meantime, Brigadier Spooky Nguyen presses to build the world's first space battleship. The Reaper Plague puts you in the middle of more Plague Wars action, expanding your favorite characters and extending the most popular story lines from the earlier books.