The second novel from the acclaimed author of Kill the Father, a Richard and Judy 2017 Bookclub pick and Sunday Times bestseller.

In Rome, a high-speed train from Milan draws into the city's main station with a carriage full of dead bodies. Preliminary investigations are put in the hands of Deputy Police Commissioner Colomba Caselli.

The police receive a message claiming responsibility for the act and announcing more murders to come, and they duly turn their attention to a small terrorist group of Islamic extremists. But investigator Dante Torre does not believe this angle. For him, this feels like a smokescreen concealing the actions of a killer who has a far more terrible motivation to continue.
     
This multi-layered, complex thriller, full of epic twists that take the reader through Rome, Berlin and Venice sees the return of the most compelling crime partnership in recent years.