Beacon 23

For centuries, men and women have manned lighthouses to ensure the safe passage of ships. It is a lonely job, and a thankless one for the most part. Until something goes wrong. Until a ship is in distress. In the twenty-third century, this job has moved into outer space. A network of beacons allows ships to travel across the Milky Way at many times the speed of light.
These beacons are built to be robust. They never break down. They never fail.
At least, they aren't supposed to.
"{Beacon 23}…is the perfect blend of a fast-paced action coupled with a psychologically insightful portrait of loneliness, of the little idiosyncrasies we develop when living on our own, and how we crave companionship."
"A remarkably compassionate and forward-looking story of war and mass murder."