The Lost Heir - The Inheritance Ring Series, #1

Standing atop a promontory, she sees them coming... interlopers in the desert, clumsy outsiders whose caravan blazes a trail of dust. Alisutton d'ere Lihter, who her brothers once called "Button", was abandoned in this wasteland, years ago. Is it those who betrayed her, returning? And if so... why? The answer will bring a girl the world thought dead back across the desert, home to a place she barely remembers.
She is The Lost Heir, last of her line... but the secret she carries with her won't put her on the throne. Instead, it prompts a race across the land, a daring rescue, and brings to light yet more mysteries. Who is hunting her along the way? Can she trust what's left of her family or the strangers who have taken her into their fold... or only herself? With her bow and her spear, her heart and her wits, and an indomitable will to survive, Button will find the answers.
But she will also learn, like the wind in the desert, what we learn can change us. For good or ill, she will never be the same.