The following books are just a few that have helped enormously in researching this novel:
Fugitive Ireland: European Minority Nationalists and Irish Political Asylum, 1937–2008, by Daniel Leach, Four Courts Press.
Commando Extraordinary: Otto Skorzeny, by Charles Foley, Cassell Military Classics.
Rescuing Mussolini: Gran Sasso 1943, by Robert Forczyk, Osprey Publishing.
Haughey’s Millions: Charlie’s Money Trail, by Colm Keena, Gill & Macmillan.
JFK in Ireland: Four Days that Changed a President, by Ryan Tubridy, Collins.
News from a New Republic: Ireland in the 1950s, by Tom Garvin, Gill & Macmillan.
Finally, I must thank the late Cathal O’Shannon, whose documentary Ireland’s Nazis first planted the seeds of this story in my mind.