Shadow Hawk — Andre Norton

He was the lord of the Striking-Hawk Nome, but for generations that holding had been in the firm grip of the invaders. And so he was merely Rahotep, officer of the renowned Nubian archers, unjustly deprived of his birthright by his scheming half-brother and exiled in the desert for a sacrilege he didn't commit.

But his bow was strong, his arrows swift--and his thirst for justice in the Pharaoh's land knew no bounds...and offered no mercy!