Australian author Williams makes his YA debut in this danger fueled science fiction tale. Improvement, a transportation device, enables anyone to transform their appearance or intelligence by using the technology called d-mat. Few believe it can work, including 17-year-old Clair. Her concern is justified when her best friend Libby uses Improvement to remove a prominent birthmark. When Libby changes in surprising and terrifying ways, Clair must dig for answers and is plunged into an ever-deepening web of conspiracy and danger.