Some concepts work better as games than as novels, and parts of this story fall into that category. There are simply too many McGuffins in the book, some of which simply don't pay off by the end. Some will be addressed in sequels, I'm sure, but it may or may not be worth the wait. It is easy to see how these might fit into the worldbuilding for the game, but they weaken the narrative of this novel.
Most difficult of all, the author tried to cram in a back story for the start of the devastation, and that part simply didn't work. The post-apocalyptic world itself is fairly standard, and for fans of the style, it works pretty well. Unfortunately, the back story isn't nearly as convincing, involving the 21st-century development of MANY advanced technologies, ranging from miraculous nano-machines, cryogenic preservation, nuclear-powered drill machines and a host of other things, all in secret but somehow shared by governments worldwide. Oh, yes, and the ability to hush up every amateur astronomer in the world, when an object that would be the focus of almost every telescope in the world suddenly changes course...
The actual post-apocalypse story is told much better, and involves mutants, evil dictators, survival situations, running battles with cars and a host of other things that any Mad Max fan would enjoy.
The craftsmanship of the post-collapse story earned this book its third star, but it was a near thing.
The book did manage to do one intended thing, which is to intrigue me about the game.