Menace from Moscow - The Last Humans, #3

In the third novel of this post-apocalyptic sci-fi trilogy, the critical and difficult management of geopolitics in a post-apocalyptic world caused by a worldwide bioengineered virus continues: Survivor Penny Castro and her friends' new task is to recover nuclear-armed missiles aboard a US submarine that sunk off Cuba's coast at the beginning of the pandemic. As if the train ride from Colorado to Florida across a dangerous, desolate, and devasted US isn't enough, what awaits them in the Caribbean and beyond will put any fan of sci-fi thrillers on the edge of their seats.
From SoCal to Cheyenne Mountain and on to Florida, Cuba, and what remains of the Russian Federation, Penny's adventures are full of mystery, thrills, and suspense.