~ WINNER of 7 BOOK AWARDS ~ A teen fantasy mystery compared by readers to 'Harry Potter' and 'The Chronicles of Narnia'. IN A SEE-THROUGH LAND our reflections live. They call us Sound; they are our Echoes—and they think that they must die when we do. Is this why children are disappearing from the Sound realm? Because someone wants their Echo to die? Twelve-year-old Will Cleary tries to escape the frightening answer. But dangers sweep him into that magical, see-through land. And there, in a fortress filled with castaway children, a two-hundred-year-old riddle lies buried. The most important boy in Echoland will help Will solve it, with a handful of other teens. For the fate of Echoland, and of the Sound realm, depends on the answer. An answer hidden in an ancient book… Deep in a frozen lake of gems… Beyond a buried door… At the foot of the greatest Crystillery of all. But many men and monsters, crystal balls and spying eyes, will try to stop the brave teens. "A young hero must ally with his alter ego in an intricate parallel universe in order to rescue his sister and save his own life. A gripping...fantasy coming-of-age novel." -Kirkus Reviews.