Irish Pilgrimage: Holy Wells and Popular Catholic Devotion
Johns Hopkins University, 1999. First edition.
Scotland, Ireland, & Wales
Ireland's Pirate Queen : The True Story of Grace O'Malley.
MJF, 2003. Reprint.
The War For Ireland, 1913-1923.
Osprey, 2009. First edition, first printing.
The Ancient Celts.
Oxford, 1997. First U.S. edition.
The Celts.
Little, Brown & Co., 1986. First U.S. edition.
The Irish Parilamentary Tradition.
Gill and Macmillan, 1973. First edition, first printing.
Seventy Years, 1852-1922: An Autobiography.
Macmillan, 1976. First U.S. edition.
The Science of Man in the Scottish Enlightenment : Hume, Reid & Their Contemporaries.
U. of Edinburgh, 1989. First edition, review copy.
The Great Shame and the Triumph of the Irish in the English Speaking World.
Doubleday, 1999. Second printing.
'The French Disease' : The Catholic Church and the Radicalism in Ireland, 1790-1800.
Four Courts, 1993. First edition, first printing.
When the Irish Invaded Canada : The Incredible True Story of the Civil War Veterans Who Fought for Ireland's Freedom.
Doubleday, 2019. First edition, first printing.
1916.
Tom Doherty/Forge, 1998. First edition, first printing.
Ma, Now I'm Goin Up in the World: A Memoir of Dublin in the 1960s.
Seven Stories, 2014. First edition, first printing.
Maire Rua: Lady of Leamaneh.
Ballinakella Press, 1990. First edition, first printing. Glazed boards, no dust jacket.
Highlanders: A History of the Scottish Clans.
Viking Studio Books, 1995. First US edition, first printing.
No Ordinary Women. Irish Female Activists in the Revolutionary Years 1900-1923.
University of Wisconsin Press, nd. Reprint.
'Tis: A Memoir.
Scribner, 1999. First edition, first printing. Signed by the author.
Singing My Him Song.
HarperCollins, 2000. First U.S. edition.
Before Scotland : The Story of Scotland Before History.
Thames & Hudson, 2005. First edition, first printing.
The New Irish Constitution: An Exposition and Some Arguments.
Kennikat Press, 1971. Reprint. Brown cloth, no dust jacket.
John Blake Dillon, Young Irelander.
Irish Academic Press, 1990. First edition, first printing.
Spying on Ireland : British Intelligence and Irish Neutrality During the Second World War.
Oxford, 2008. Second printing.
A Traitor's Kiss: The Life of Richard Brinsley Sheridan.
Granta, 1997. First edition, first printing.
We Don't Know Ourselves : A Personal History of Modern Ireland.
Liveright, 2022. First American edition, first printing.
Ireland's Holy Wars: The Struggle for a Nation's Soul, 1500-2000.
Yale U. Press, 2001. First U.S. edition.