Book excerpt: In her breathtaking young adult debut, bestselling author Cecelia Ahern depicts a society in Flawed in which obedience is paramount and rebellion is punished. And where one young woman decides to take a stand that could cost her everything. Celestine North lives a perfect life. She's a model daughter and sister, she's well-liked by her classmates and teachers, and she's dating the impossibly charming Art Crevan. But then Celestine encounters a situation in which she makes an instinctive decision. She breaks a rule and now faces life-changing repercussions. She could be imprisoned. She could be branded. She could be found FLAWED.