Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Starts good and than it trails off...

Unfortunately, although it starts on a good note, with intriguing international premises, the book gets pretty quickly under "nobody can beat US because we are US" spell. So, instead of really exploring the possibilities and alternate scenarios, the book spins towards the only ending author could have imagined - US will win no matter what or how. Author would do well to read "The Two Georges" to see how to write an objective alternate history novel, or perhaps "The Man in a High Castle"