Beacon 23

For centuries, men and women have manned lighthouses to ensure the safe passage of ships. It is a lonely job, and often a thankless one. In the 23rd 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. $1.49 on Kindle.