Dark Sun - Brandon Myer

The year is 2069. Nearly all humanity has abandoned Earth as torrential environmental disasters consume the planet, leaving its people to move on beyond the atmosphere.

After Project Atlas started colonization of neighboring planets, now only but a few remain on their dying celestial body. The International Space Station investigates a mysterious transmission sent across the airwaves from outside governed space speaking cryptic words, invoking mass hysteria among the people.

Task Force Orion is sent to uncover the source. What they discover is a conspiracy far beyond the scope of what the human mind can comprehend.