Books:
* The Myth of the Secret State: (1991) This book examined the extent to which the British government used illegal and unethical methods to achieve its goals, including bugging, surveillance, and disinformation.
* The Secrets of the State: (1995) This book focused on the role of the intelligence services in British society and the controversies surrounding them.
* The New Authoritarians: The Rise of the Right in Europe and America: (2017) This book explores the growing influence of right-wing populism in the West.
* The Age of Surveillance: (2019) This book examines the increasing use of surveillance technology by governments and corporations around the world.
Articles and essays:
Campbell has written numerous articles and essays for publications like The Guardian, The Observer, and The Independent, covering a wide range of topics, including:
* Government cover-ups and scandals: He has written extensively on the Watergate scandal, the Iran-Contra affair, and the Iraq War, among others.
* Intelligence and surveillance: He has exposed secret government surveillance programs, including the "Echelon" system and the use of drones for targeted killings.
* Human rights and civil liberties: He has written about the erosion of civil liberties in the name of security, particularly in the context of the War on Terror.
* Political corruption: He has investigated corruption within the British government and exposed the role of money in politics.
Other notable works:
* Co-founder of the investigative journalism group "The Secret State": This group has published numerous books and reports on government secrecy and misconduct.
* Executive editor of the "Fortean Times": This magazine explores paranormal phenomena and other unexplained events.
Campbell's work has been praised for its meticulous research, groundbreaking revelations, and commitment to public accountability. He is considered one of the leading investigative journalists of his generation.