Two stars because this is not my expectation of a sci fi story. This story has all the masala but none of the main ingredients.
I'm reviewing after only a few chapters, but you lost me at the earth losing gravity for no reason given, not even a mad fantasy reason. Gravity is to be replaced by Particle B, to be hauled from outer space. That's too banal and ... Hollywoodish.
That said, there is nothing objectionable about the story or the treatment. The writing is fairly taut, there are neither typos nor bad grammar nor bad editing. The characters are reasonably developed and decent humans. I just expected it to be more hard sci fi, which is my fault because the intro on this page is clear enough that the Earth is just sick and tired of humans. So, if that's your scene, have at it.
(reviewed 2 years after purchase)