Our solar system will never be the same. Book 6 of The Expanse picks up right after the end of the last one in the bleak aftermath of the sudden and devastating attack on Earth by the Free Navy. Out of nowhere they laid waste to the bread basket of the solar system and now humanity struggles to pick up the pieces and find a way to survive. The super powers of the solar system who were central to mankind's expansion into space now find themselves mere shadows of their former selves and short on resources. Earth is in disarray after the attacks with billions of starving people and Mars is a hollow shell after being left behind by those that moved through the ring gate to colonize other planets with actual atmospheres. To add insult to injury, those same Martian defectors were the source of the military ships acquired by the Free Navy to wreak havoc on Earth so Mars also finds itself in the middle of a political upheaval.
Babylon's Ashes - humanity on the brink in the latest Expanse novel