For the Love of Mars - The Silent Gene, #2

Mars resembles Earth in many ways, except it's red and dead. But terraformed Mars is greening up. And life exists on the surface, below ground, and in a mysterious Robot Graveyard. (More on that later??)Lucas Wilson, an astronaut on Mars, and member of the Gilgamesh Movement, a terrorist organization, has been instructed to prepare the planet for imminent colonization and do away with his fellow astronauts after he sabotaged Earth's climate.
But even after killing hundreds of thousands on Earth, he is reluctant to take this final step. The question is: how can he oppose the organization's leader, Samson Teshda, a man who has devoted his entire existence to annexing the planet for his own people? This man has stridden over the boundaries of Earth's laws and civil society. He's even pushed the boundaries of evolution, creating genetic enhancements that provide extraordinary advantages, all for the love of Mars. But for the love of Mars, how can he not? The man is psychotic, as much a threat to their survival as terrifying, terraformed Mars itself.