Twin Crowns - Catherine Doyle

HarperCollins Publishers - <p>Two sisters. One throne. Who will ultimately rise to power and wear the crown? Wren Greenrock has always known that one day she would steal her sister's place in the palace. Trained from birth to avenge her parents' murder and usurp the princess, she will do anything to rise to power and protect the community of witches she loves. Princess Rose Valhart knows that with power comes responsibility including marriage into a brutal kingdom. Life outside the palace walls is a place to be feared and she is soon to discover that it's wilder than she ever imagined. Twin sisters separated at birth and raised into entirely different worlds are about to get to know each other's lives a whole lot better...</p>