Romulus (the Innerworld Affairs Series, Book 1)

Trapped in the Earth's core, Aster Mackenzie longs to return home while navigating a world dominated by advanced humanoids mining a rare energy source for their planet, Norona. Complicating her situation, she inadvertently ignites a mating fever in Romulus Locke, the Chief Administrator of Innerworld. As tensions rise, Aster must find a way to escape while dealing with the unexpected consequences of her presence in this alien society.