Xanthea of Mars. Time of Oceans, #1

Xanthea's past survives only in fractured nightmares; her present in the stares her dark hue draws in a pale world. Neither defines her. Only the woman who gave her a life she believes she can never repay. When her lost history collides with the present, new ideologies rise and old safeguards fracture. As the balance sustaining a dying world begins to unravel, the ancient machines that keep Mars alive start to fail.
Racing across a drying planet to prevent another apocalypse, Xanthea must decide who she is beyond obligation-and whether saving the world is worth losing the one person who gave her the will to defend it. Because a world that does not remember its past has no future.