The Eslites Prequel by CM Doporto
Summary: Can Miranda save the Eslites?
When an advanced alien species invades Earth, it negotiates an agreement with the world’s leaders to provide cures for various human diseases in exchange for a generation of young women. Detained in an otherworldly facility named Nidus, sixteen-year-old Miranda Mays is designated a superior donor and must submit to risky egg extractions, which the Eslites fertilize in a last-ditch, desperate attempt to reproduce. While Miranda is more than willing to help the aliens survive, she soon wonders if there is more to their story.