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 Car...