The narrative centers on the subsequent conviction of Wang Yam, a Chinese political dissident, for Chappelow's murder. Harding reconstructs the case using both public facts and evidence that the police never encountered, highlighting a landmark legal moment: it was the first time in modern British history that a criminal trial was held entirely for reasons of national security. The book explores several interconnected layers:

: The eccentric life of Allan Chappelow and his connection to historical figures.

: Details of the forensic process and the "criminal puzzle" involving identity theft and illicit activities.

: It won the prestigious CWA Gold Dagger for Non-Fiction from the Crime Writers' Association.

The book received critical acclaim for its investigative depth:

: The secretive nature of the trial and the potential for a miscarriage of justice, as Harding presents details that cast doubt on the original verdict. Recognition

: Reviewers have noted its fluid rhythm, comparing its pacing to that of a high-stakes thriller. Availability