Voyage of Earthen - R. J. Pierson - Bog

Driven to unlock the secrets of their families, Myet and Leokles find themselves scouring underground labyrinths and palace halls in search of the truth at any cost, but they are determined to do so alone.
After fleeing as fugitives, these students continue their journey together on a voyaging ship across the planet Nemesyne. When they arrive in a desert land ruled by an all-powerful pharaoh, Myet begins to unravel shocking forbidden knowledge about the planet and her past. And while Leokles sets out on a hunt for an obscure substance, he faces deadly disasters and incredible places no one has seen in centuries.
Myet and Leokles threaten the balance between the tenacious pursuit of their deepest heart's desire and navigating the expectations of their teenage lives. But what they value as self-reliance, others view as stubbornness to the point of risking their remaining relationships.
When their quests come to an abrupt halt and neither can go any further, they must learn to adapt and, most importantly, to trust. Otherwise, they risk losing their most treasured truths, which turn out to be much bigger and more entwined than they ever imagined.