Curiosity, Thy Name is Hera

From the introduction: Seca-4-8 is a mining colony on a distant planet at the edge of known space. It is an unknown rock with little value to most. That’s just fine for Katie Tower, the colony’s corporate administrator. She found a motherlode of Corium-15, a highly valuable isotope vital for space travel, mining it for her own profit under the nose of her own company, Veritan Mining Concern.