Spice Road - Maiya Ibrahim

The first book in an epic fantasy series set in an Arabian-inspired land with secret spice magic. Raised to protect her nation from the monsters lurking in the sands, sixteen-year-old Imani must fight to find her brother, whose betrayal is now the country's greatest threat.
In the hidden desert city of Qalia, there is secret spice magic that awakens the affinities of those who drink the misra tea. Sixteen-year-old Imani has the affinity for iron and is able to wield a dagger like no other warrior. She has garnered the reputation as being the next great Shield for battling djinn, ghouls, and other monsters spreading across the sands. 

Her reputation has been overshadowed, however, by her brother, who tarnished the family name after it was revealed that he was stealing his nation's coveted spice—a telltale sign of magical obsession. Soon after that, he disappeared, believed to have died beyond the Forbidden Wastes. Despite her...