They shot everyone. His friends, his colleagues, the woman he loved. And then they vanished into the night. But they left one clue. A clue by which he knows he can track them to their lair. And when he gets there, he's going to kill them all. Or die in the effort.

Detective Sergeant Mark 'Heck' Heckenburg has a reputation for bending the rules, but when a ruthless gun attack on a North London pub leaves 26 of his closest workmates dead, he throws the rulebook away.

Devastated beyond recovery, he goes rogue.

But Heck himself is a suspect. Suspended from duty and watched day and night, it isn't just a matter of eluding the surveillance net in London, and so when he makes his move, he becomes a fugitive, an outlaw now infamous across the whole of the UK.

And yet that's the least of his problems. Because as Heck heads north through the wintry badlands of industrial England, and from there into the mountainous wilds of the Scottish Highlands, the killers and their acolytes, who know full well that he is coming, have prepared accordingly, and some deadly and deranged individuals are lying in wait ...

Another hard-as-nails addition to the hugely popular crime series. Ideal reading for fans of MW Craven, Stuart MacBride and Lee Child ..