Penrhyn Books

year of pub­li­ca­ti­onISBNauthor(s)title
2011978-0-9565884-1-8David LeedhamThe Limits of the Habitable World: Ireland and the Conquest of Britain 43 - 224 (Bitter Sea)
  ''978-0-9565884-2-5   ''Imperium: Britain and Ireland - the Maintenance of Control 225 - 367 (Bitter Sea)
2010978-0-9565884-3-2   ''Born for the Good of the State: Emperor Flavius Magnus Maximus, Wales, and the Later Roman Empire 367-411 (Bitter Sea)