From the bestselling author of Sirens comes this gritty new thriller. As a series of blackouts plunge the city into darkness, Detective Aidan Waits sits on an abandoned hospital ward, watching a mass murderer slowly die. He has one job: to extract the location of Martin Wick's final victim. But Wick's final words tell of an unfeeling contract killer at work - and Aidan's name is next on the list. The third book in the DC Aidan Waits series.