Novels
The Wind from Hastings (1976)
Lion of Ireland: The Legend of Brian Boru (1980)
The Horse Goddess (1982)
Bard: The Odyssey of the Irish (1984)
Grania (1985)
Red Branch (U.K. - On Raven’s Wing) (1986)
Druids (1989)
O’Sullivan’s March ()
Strongbow ()
The Elementals ()
Finn Mac Cool (1994)
Pride of Lions (1995)
The Irish Century series:
1916    (published 1998)
1921    (published 2001)
1949    (published 2003)
1972    (published 2005)
1999: The Search for Peace (forthcoming: 2008)
Non-Fiction
Xerxes of Persia(1987)
Vikings in Ireland (1996)
The Pocket Book of Irish Rebels (2000)