When small-time heroin dealer Jai McDiarmid turns up dead one fine Glasgow morning, no one is that surprised - he'd been sleeping with a drug trafficker's girlfriend and had made himself a lot of enemies - so many, in fact, that Detective Superintendent Catherine McLeod doesn't know where to start when she is assigned to the case.

Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

After losing his leg to a land mine in Afghanistan, Cormoran Strike is barely scraping by as a private investigator. Strike is down to one client, creditors are calling, and after a breakup with his longtime girlfriend, he’s living in his office. Then John Bristow walks through his door with a shocking story: His sister, the legendary supermodel Lula Landry - known to her friends as the Cuckoo - famously fell to her death a few months earlier.

Two years ago, a hostile Prime Minister launched the Monochrome inquiry, investigating "historical over-reaching" by the British Secret Service “to investigate historical over-reaching.” Monochrome’s mission was to ferret out any hint of misconduct by any MI5 officer—and allowed Griselda Fleet and Malcolm Kyle, the two civil servants seconded to the project, unfettered access to any and all confidential information in the Service archives in order to do so. But MI5’s formidable First Desk did not become Britain’s top spy by accident, and she has successfully thwarted the inquiry at every turn.

The first time somebody tried to kill him was an accident. The second time was deliberate. Now Paul Mulchrone finds himself on the run with nobody to turn to except a nurse who has read one-too-many crime novels and a renegade copper with a penchant for violence. Together they must solve one of the most notorious crimes in Irish history. Or else they’ll be history.