Even though Mayfield develops an interesting premise, not much happens in Ten Days. The title serves more as an introduction to a series than a strong novel that stands on its own. This is categorized as New Adult, but not much sets it apart from YA other than sexuality. While this isn’t the weakest of the genre, it doesn’t particularly stand out.
The Machine contains a perfect society that relies on the power of mind and the resistance of conflict. But as the Machine starts to break down, Cally becomes disillusioned by its benevolence. Her developing feelings for Marshal opens doors to resistance, leading her to be one of the few who can save their world before it’s too late.