Nellie is an Advanced Cadet in the Black Core Program at the Detta training center, where weapons and violence are just part of her normal life. She’s told that her training will serve the Goddess and the Empire, but the cadets are trained not to think but rather just to obey. However, when her training brings her face-to-face with a twin she never knew existed, her rebellious sister begins to poke holes in her seemingly perfect world and awaken her to the destruction and lies she’s been taught her entire life. A fascinating and dark story about a totalitarian world where memories can be instantly erased, violence is encouraged, and families are a thing of the past, this sequel to Flux is not without flaws. The astrology, caste system, and religion in the book is confusing and left mostly unexplained, with feeble attempts at the end to patch everything together, which takes away from the intensity of the futuristic, totalitarian world gone awry and Nellie’s struggle to understand her own identity and place.