In 1277, Llywelyn ap Gruffudd, Prince of Gwynedd, met with Edward I of England in Aberconwy to finalise a treaty that would change the fate of both nations. His hand forced by Edward's invasion earlier that year, Llywelyn's acceptance of the terms confirmed not only short-term peace but also that the rule of Wales would pass to Edward on his death. To augment his rising dominance, the English king embarked on a building project that saw the rise of some of the most recognisable fortresses in Europe. Quite literally, an 'Iron Ring' of castles. AUTHOR: John Paul Davis is the international bestselling author of eleven thriller novels and four works of historical non-fiction. His debut thriller, The Templar Agenda, was a UK top 20 bestseller; The Cortes Trilogy has also been an international bestseller. As well as being a thriller author, his debut work, Robin Hood: The Unknown Templar, has been the subject of international attention, including articles in The Sunday Telegraph, The Daily Mail, Yorkshire Post and Nottingham Evening Post, mentions in USA Today and The Independent and reviews in the Birmingham Post and Medieval History Journal. His second work, Pity for the Guy, was the first full-length biography of Guy Fawkes and was featured on ITV's The Alan Titchmarsh Show in November 2011. His most recent work on Henry III, The Gothic King, was released in 2013. His latest work of non-fiction, A Hidden History of the Tower of London, also published by Pen & Sword, was released in February 2020. He was educated at Loughborough University and lives in Warwickshire. His websites are www.officiallyjpd.com and www.theunknowntemplar.com. Twitter @unknowntemplar. 25 b/w illustrations