Great story, and character development. I liked the references to the Maunder Minimum, and the scientific basis for the apocalyptic ice age. It was a gritty, realistic take on the decisions that would need to be made, as well as on human nature. Note that there is some swearing in this book series; but it’s not egregious. That is why I dropped the overall rating by one star. I received a free copy of this audiobook, with no obligation.