Memento Mori Station

Protect the dead.

A thousand years have passed. Nyle, the only raven still on Earth, dutifully continues to tend the dead. His mind-reading assistant, Em Collins, helps him return to the present when memories pull him into echoes of the past. However, a mysterious invitation from a distant space station breaks Nyle's routine. He'd had no intention of leaving Earth, but the message ends with a coded SOS from his old friend Ethan West. Nyle doesn't hesitate. 

As his spaceship approaches the station, Nyle has plenty of time to consider the deep cold that signals a massive quantity of untended dead. Records show that multiple ravens had traveled to the station, yet no raven has ever left. Nyle refuses to abandon either Ethan or the dead, but the vast distances of space mean that whatever mysteries or obstacles surface, Nyle will have to face them with only the aid of his small team. 

The past and the future come together in the final installment of the Grave Cold trilogy!