Green Mars continues the epic saga of the colonization of Mars by Kim Stanley Robinson. Nearly a generation has passed since the first pioneers landed, and the transformation of Mars into an Earthlike planet is underway. However, the project faces opposition from those who wish to preserve the planet's hostile, barren beauty.

At the forefront of this conflict are rebels like Peter Clayborne, part of the first generation of children born on Mars. They are joined by original settlers Maya Toitovna, Simon Frasier, and Sax Russell. In the backdrop of this cosmic setting, the human elements of passions, rivalries, and friendships intensify, creating a story as breathtaking as the planet itself.