Dreams of Crystal: a science fiction romance story - Science Fiction Romance stories, #5

Mavall knows his role in life: best friend to the great Dreymond Valenki-the most powerful man on the remains of the Pacific Rim. But when they travel together into the crystal caverns of Luna seeking answers, their paths diverge. Rediscovering the past permanently alters the paths of Drey, Mavall, and the woman they both love as they seek to understand the dreams of crystal.