This is a fascinating work on the history of the British Secret Service. It examines its origins and deals with the role it played in the First World War. Their are chapters on codes, submarines, plots, and other highly interesting aspects of military espionage. This book is part of the World War One Centenary series; creating, collating and reprinting new and old works of poetry, fiction, autobiography and analysis. The series forms a commemorative tribute to mark the passing of one of the world's bloodiest wars, offering new perspectives on this tragic yet fascinating period of human history. Each publication also includes brand new introductory essays and a timeline to help the reader place the work in its historical context.