10. Starborn: Agartha

Beneath Earth’s surface, a civilization has preserved what the world above forgot.

The search for Agartha draws the Starborn toward a hidden society shaped by extraordinary technology and ancient wisdom. Its history reaches into humanity’s forgotten origins.

As pathways into the concealed world emerge, discovery brings consequences. Old alliances, unresolved conflicts, and knowledge surviving beyond the reach of the surface force the travelers to reconsider their purpose.

Agartha descends into a sanctuary whose secrets extend far beyond its borders. What waits beneath Earth may change how humanity understands its future among the stars.

A Starborn novel of hidden worlds and ancient-civilization adventure by Mark A. Radler.