Blue Mars is a science fiction novel written by Kim Stanley Robinson, published in 1996. It is the third book in the Mars Trilogy, following Red Mars and Green Mars. The story explores the ongoing colonization and terraforming of Mars, focusing on the social, political, and environmental challenges faced by its inhabitants. The novel delves into themes of sustainability, human evolution, and the impact of technology on society. As the characters navigate their complex relationships and the changing landscape of Mars, they confront ethical dilemmas and the consequences of their actions in shaping a new world.