Each book in the Post-Human series isn't very long, or deep, so don't expect a ton of character development here; however, David Simpson does cram a dizzying array of science fiction topics into this small space. The sci-fi concepts include nano-technology, human augmentation, Matrix-like virtual reality, sentient artificial intelligence, Borg-like assimilation, terraforming, and alternate universes just to name a few. The story itself is a wild ride that goes from one mankind threatening scenario to another in rapid succession with hardly a breath in between. It is an over the top action movie in book form with mankind constantly on the brink of extinction as the lead characters battle to save it.