Defend the Realm

"Defend the Realm" marks a groundbreaking milestone by providing an in-depth, unrestricted account of MI5's history, from its origins in 1909 to its contemporary role in counterespionage and counterterrorism. Based on the first-ever access to the agency's archives, the book offers insights into its management, relationships with government, and significant successes and failures, shedding light on its influence within the UK. It also explores key events and figures, dispelling myths and enhancing understanding of this secretive organization’s place in British history.