Denis M. MacEoin (born 1949, Belfast, Northern Ireland) was a "Senior Editor" from 2009–2010 at Middle East Quarterly, a publication of the conservative American think tank Middle East Forum, where he is also a Fellow. A former lecturer in Islamic studies, his academic specialisations are Shi'ism, Shaykhism, Bábism, and the Bahá'í Faith. MacEoin is also a novelist, writing under the pen names Daniel Easterman and Jonathan Aycliffe.
MacEoin studied English Language and Literature at the University of Dublin (Trinity College) and Persian, Arabic and Islamic Studies at the University of Edinburgh. He carried out research for his PhD degree at King's College, Cambridge. His PhD dissertation dealt with two heterodox movements in 19th-century Iranian Shi'ism: Shaykhism and Bábism. From 1979–80, he taught English, Islamic Civilization, and Arabic-English translation at Mohammed V University in Fez, Morocco, resigning from the University shortly after commencing employment there. MacEoin claims the resignation was due to disputes over contract changes, working environment and payment for his services as a Lecturer. In 1986, he was made Honorary Fellow in the Centre for Islamic and Middle East Studies at Durham University. He was the Royal Literary Fund Fellow, assisting with academic writing at Newcastle University from 2005–2008,
MacEoin has published extensively on Islamic topics, contributing to the Encyclopaedia of Islam, the Oxford Encyclopaedia of Islam in the Modern World, the Encyclopædia Iranica, the Penguin Handbook of Religions, journals, festschrifts, and books, and has himself written a number of academic books.
- Rituals in Babism and Baha'ism. UK: British Academic Press and Centre of Middle Eastern Studies, University of Cambridge. 1994. ISBN 1-85043-654-1.
- The Messiah of Shiraz: Studies in Early and Middle Babism. Leiden: Brill. 2008. ISBN 978-90-04-17035-3.
- Dear Gary, Why You're Wrong about Israel. US: Library of Middle Eastern Democracy. 2013. ISBN 978-0957482500.
- Music, Chess and Other Sins (PDF). London: Civitas. 2009. ISBN 978-1906837068. (Report on radicalism in about 80 schools in the UK)
Since 1986, McEoin has pursued a career as a novelist, having written 26 novels. He uses the pen names Daniel Easterman (international thrillers) and Jonathan Aycliffe (ghost stories).
- The Last Assassin (1984)
- The Seventh Sanctuary (1987)
- The Ninth Buddha (1988)
- Brotherhood of the Tomb (1989)
- Night of the Seventh Darkness (1991)
- The Name of the Beast (1992)
- The Judas Testament (1994)
- Day of Wrath (1995)
- The Final Judgement (1996)
- K (1997)
- Incarnation (1998)
- The Jaguar Mask (2000)
- Midnight Comes at Noon (2001)
- Maroc (2002)
- The Sword (2007)
- Spear of Destiny (2009)
- Naomi's Room (1991)
- Whispers in the Dark (1992)
- The Vanishment (1993)
- The Matrix (1994)
- The Lost (1996)
- The Talisman (1999)
- A Shadow On the Wall (2000)
- A Garden Lost in Time (2004)
- The Silence of Ghosts (2013)
- Collection of articles from Islamophobia-Watch.com concerning MacEoin
- BBC's Newsnight report on allegations of forgery concerning "The Hijacking of British Islam" report authored by MacEoin