Tempest on Tau Ceti
Someone thinks gamma rays are useful. Captain Jackson is sent back to the fourth planet of the Tau Ceti system when a nuclear power plant is discovered. Since the civilization on the planet is similar to Earth's Bronze Age, the Space Administration suspects alien technology. But why? He contacts a friend to get information, and gains employment inside the thorium reactor. He finds there's another reason, motivated by profit, of not just one alien species, but two. When the facility is bombed, Jackson uncovers a dirty secret that will require an intervention of higher powers.
A novella in the Pioneer Expeditions group. Economy Price just 99c