Sean Martin is an Anglo-Irish writer and film director. He has written popular books on the Knights Templar and the Cathars, and appeared on History Channel documentaries such as Decoding the Past: The Templar Code and in Channel 5's Secrets of the Cross: The Trial of the Knights Templar. Martin studied film and history in Plymouth, and later lived in London. He is also a poet, and has had a number of poems published in various magazines in the UK and Ireland, and also won the 2011 Wigtown Poetry Prize. His most recent book is The Gnostics: The First Christian Heretics, on the subject of the early Christian Gnostics. He is currently writing a book on new wave cinema, due for publication in 2013

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