A threat has been made. An ultimatum delivered. Innocent people are in mortal danger. The gripping new bestseller from the master of the race-against-time thriller. The Threat 8am: an explosion blasts through a cafe in Central London. The Ultimatum: Minutes later, a call from an unknown terror group warns that a far greater attack will be launched in 12 hours' time. The Prisoner: William Garrett, AKA Fox, is awaiting trial for mass murder. He claims he can name the bombers. But only at a price. The clock is ticking. It's a terrifying race against time for DI Mike Bolt and DC Tina Boyd as they chase their targets across the city in a desperate bid to stop a major atrocity — before it's too late...