The Key Book 1: On the Threshold

The half-human daughter of gifted scientists, Hali has spent most of her sixteen years working alongside her parents to find the antidote to an alien disease. When she and her frail brother are suddenly orphaned, they must journey with Alexis, Key to the Eidelon System, back to the planet of their birth—and a realm now facing civil war. Here Hali strives to continue her parents’ work, hoping to stabilize the region by healing the dying Queen of Lohr. But not all diseases have a cure, and not all cures end suffering.