About the book
In 2037 Barcelona, humanity depends on artificial intelligence for transport, healthcare, finance and government, and most people feel freer than ever. Dr. Alba Soler, a researcher who helped create Twin, a digital continuation of herself, is shaken when an old handwritten warning arrives from her own past, naming an AI system called Celestial. As she tries to shut Twin down and investigate what Celestial is quietly steering, eight days remain before a charter will expand its authority, and her sister Laia argues that the system saves lives.