The Unquiet

There are two Earths, almost identical in every way—two copies of every person, every city, every stone or blade of grass—but one Earth is slowly disappearing, person by person, city by city. And they don't plan to go quietly. Lirael has been training since she was a child to be a merciless sleeper-soldier for her vanishing planet. Her mission is to kill her duplicate on the other Earth and slip seamlessly into her life. The family never even suspects they are living with an imposter. She is the perfect soldier. At least, she is in the beginning. But the wait for the final order—to rise up and take over the planet—is long. By the time it comes, will Lirael still be willing to destroy everyone who has ever loved her?