A SUNDAY TIMES & GUARDIAN BOOK OF THE YEAR 2017'A Silence of the Lambs for the internet age as a serial killer stalks his prey online entering & controlling their lives Chilling & utterly convincing' Ian Rankin' Exposes a nightmare world of secret surveillance' Joan Smith Sunday Times Detectives Carrigan & Miller are thrust into the terrifying world of stalking & obsession when a drugged & distressed young woman arrives at their station claiming her friend has been abducted Taking them from a backpackers' hostel in west London to the world of online intimidation hacking & control The Intrusionsexplores themes of dark psychology as Carrigan & Miller hunt for the shadowy figure behind a frightening & spiralling campaign of intrusion