Storm & Shield (Mages of the Wheel, Band 2)

"All you see is that I run. Why haven't you realized I always come back?"
She is lightning and storm. A spy, driven out of her home by a tyrant ruler. He is granite and earth. A guard, ordered to keep her contained.
To protect herself and her family, she's learned to go unnoticed, unseen. Suddenly a refugee in a land that once was enemy and now must be home, she isn't certain where she belongs, or what her duty is beyond her family. She can't protect them alone this time, but the only man who can help her is the only one she cannot ask.
He's sworn his loyalty to the Sultana since she lifted him out of the gutter that made him. The arrival of a foreign spy loyal to the new prince makes him question himself and his orders, and his mistakes threaten the life of the ruler he swore to serve.
War will force choices of them both. She-to remain a spy, or stand and lend her powerful, untamed magic to the Sultana of Tamar. He-to remain a loyal, unquestioning guard, or learn to trust his instincts, and his heart.
They are magic in opposition, earth and sky, steady and mutable. One immovable as stone, the other fast as the wind. Balance, sometimes, is chaos.
He needed the storm and wildness of her, he needed the way she broke him apart.