Sean McGlynn has established a reputation as a stimulating and original author of books and articles on medieval warfare. As well as writing Blood Cries Afar: The Forgotten Invasion of England 1216 and By Sword and Fire: Cruelty and Atrocity in Medieval Warfare, he has contributed to the Atlas of the Medieval World (coauthored with John Haywood and Andrew Jotischaky), The Oxford Encyclopedia of Medieval Warfare and Military Technology (edited by Clifford Rogers), and Blackwells Encyclopedia of War. His many articles have appeared in BBC History, History Today, European Review of History and many other history magazines and journals. He is also a well-known book reviewer and lecturer.