Overall I thought it was a pleasant, fun read.
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The plot was very intriguing and made me want to know more about this "machine called earth". The settings and the action sequences were tastefully done. It's hard to talk about some of the cool stuff because it would give away the story.
There are a few minor things I personally wasn't a big fan of, such as the main character seemed to have a "hero complex" or the somewhat love story side plot was a little too cliche--HOWEVER both of these did seem to get better and progress by the ending. AND other people may read it and not think he has a hero complex or that there was a somewhat cliche love side plot.
The story is well thought out and moves pretty well from the beginning to the middle to the end. There are some twists in there and the story is quite mysterious so it makes you want to know who these characters really are and what kind of place is this world they live in.
I definitely recommend this novel, it was entertaining.