"Two years ago, a hostile Prime Minister launched the Monochrome inquiry, an auditing of 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...