Eventide, Water City by Chris Mckinney

The sequel to Midnight, Water City follows a detective from the depths of earth's oceans to the moon as he unravels a cosmic conspiracy that threatens to destroy the remnants of human life.

Year 2150: Eight years after the murder of Akira Kimura, Water City’s renowned scientist and anointed “God,” the nameless antihero who tracked down Akira’s killer is no longer a detective, but a stay-at-home dad. While his wife climbs the corporate ladder of the city’s police department, he raises their now nine-year-old daughter and occasionally takes the odd job as a bounty hunter.
 
His domestic bliss is threatened when Ascalon’s Scar—the mark left by Akira’s destruction of Sessho-seki, the asteroid that nearly wiped out life on Earth—vanishes from the sky and a familiar face thought dead returns from the ocean depths to exact revenge on humanity. On a journey to the moon and back, Water City’s antihero will risk everything, including his family, to save the last of the human race—even if it means unraveling the dark conspiracy at the heart of their world.