The Age of Akra by Vacen Taylor

The foreshadowing of a dark future threatens the seven nations of Sahas. Mai is selected to train with the mysterious elemental master Sah Dohba, who will prepare her to become the protector of the desert lands. Her brother Long steps forward to travel with her as her chaperone to the Valley of a Thousand Thoughts.

A mysterious encounter brings them together with Akra, the Starchild. The trio travels on into a battle with the elements. Sandstorms. Deadly creatures. Starvation. Then a chance meeting with powerful earthfollower sets them on a new path where they must each find the strength to face a terrifying foe from the Underworld.