What Comes Before

Lord Harry Paterson, Sheriff of the County of Yorkshire, is coerced back to work for the British Security Services after witnessing the macabre death of a beautiful, young woman at a grouse shoot hosted by his friend and ex-fellow army officer, Viscount Winston Bottomly.
Unbeknownst to Harry, the woman - the Viscount’s fiancée - had stolen a top-secret file from the French consulate in London, containing information about an innovative encryption method called post quantum signal cryptograph...