Iron Gold by Pierce Brown

Darrow and his friends are in power and content with their children growing up together and all the glory that came after the Revolution. They are starting to act like the Golds they sought to kick out of power ten years previous. Elsewhere in the Universe, Lyria has only known hard work, poverty and suffering in the Mars camps and then one day her life explodes as they are butchered. By doing the right thing and saving someone important she earns a safe place for her nephew and herself. Can she trust her good fortune? The Revolution should have brought peace but instead it ushered in another Revolution. This is the first of a new series that begins ten years after "Morning Star".