Malcolm Hislop is an independent archaeological consultant with over 30 years' experience in the investigation and interpretation of historic buildings. He read history and archaeology at the University of Nottingham, where he developed a special interest in medieval buildings, and where he subsequently completed a PhD thesis based around the architectural works of the 14th-century master builder, John Lewyn of Durham. He writes regularly about medieval buildings for the academic journals, and has a particular curiosity about the process of design and construction in the Middle Ages. His publications include Medieval Masons (2000 and 2010) and John Lewyn of Durham: A Medieval Mason in Practice (2007).