A chilling contemporary thriller from Robert Harris set in the competitive world of high finance. Dr Alex Hoffmann is a visionary scientist who has developed a revolutionary form of artificial intelligence. It tracks human emotions, enabling it to predict movements in the financial markets with uncanny accuracy, making billions. But then in the early hours of the morning, while he lies asleep with his wife, a sinister intruder breaches the elaborate security of their lakeside house. So begins a waking nightmare of paranoia and violence as Hoffmann attempts, with increasing desperation, to discover who is trying to destroy him.