Original: Sean Martin, The Knights Templar, p. 13 He has been an editor for The Journal of Medieval History and written many articles on the Templars, the Cathars, various elements of the Crusades, and the reign of Philip IV of France.
Simplified: He is considered to have written the two most comprehensive books on the subject, The Trial of the Templars (/O1978/O) and The New Knighthood: A History of the Order of the Temple (/O1994/O).