Mien

From publisher blurb:

The lush world of Mien is a place of contrasts. Wild jungles cover most of the surface of the planet, while metallic cities glisten above the trees and along the mountain ranges of the world. Mien’s jungles are beautiful, but alive with peril. And the planet's indigenous race may be gifted technologists, but they have only emerged recently as a force in the wider galaxy. What secrets lurk in the ancient temples of Mien's tropical wilds? Step into uncharted territory and find out.