French historian René le Forestier’s monumental and solidly scholarly Les Illuminés de Bavière et la franc-maçonnerie allemande has been the go-to work on the original Order of the Illuminati since it came out in 1914.
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Dermot Butler and Carl Nally. Circle of Deceit: A Terrifying Alien Agenda in Ireland and Beyond. Flying Disk Press, 2018.
Nick Redfern. Control: MKUltra, Chemtrails, and the Conspiracy to Suppress the Masses. Visible Ink Press, 2018.
Rob Brotherton. Suspicious Minds: Why We Believe Conspiracy Theories. Bloomsbury Sigma, 2015.
David G Robertson. UFOs, Conspiracy Theories and the New Age: Millennial Conspiracism. Bloomsbury Academic, 2016 (Bloomsbury Advances in Religious Studies)
Larry Holcombe. The Presidents and UFOs: A Secret History from FDR to Obama. Foreword by Stanton Friedman. St Martin’s Press, 2015



Nick Redfern. For Nobody’s Eyes Only. New Page Books, 2014.
Alan Power, The Princess Diana Conspiracy: The Evidence for Murder. Probity Press Ltd, 2013.
Michael Barkun. A Culture of Conspiracy: Apocalyptic Visions in Contemporary America. University of California Press. Second edition, 2013.
Carl Nally and Dermot Butler. States of Denial: The Tuskar Rock Incident and Other Mysteries. Mercier Press, Cork, 2013.
Will Storr. The Heretics: Adventures with the Enemies of Science. Picador, 2013. 
Robert Guffey. Cryptoscatology: Conspiracy Theory as an Art Form. TrineDay, 2012.
Graham Hancock and Robert Bauval. The Master Game: Unmasking the Secret Rulers of the World. The Disinformation Company, 2011.
Mark A. Lause. A Secret Society History of the Civil War. University of Illinois Press, 2011