But even as the foreign threat looms, it's rumours of a missing child that are troubling Cook. A twelve-year-old girl was evacuated from London and never seen again, and she's just the tip of the iceberg - countless evacuees haven't made it to their host families.

As Cook investigates, he uncovers a dark conspiracy that reaches to the highest ranks of society. He will do whatever it takes to make the culprits pay. There are some lines you just don't cross.

THE LAST LINE is a blistering action thriller combined with a smart noir mystery, played out expertly against the taut backdrop of the British home front.