- *A London Child of the Seventies* (1934)
- *The Man of Aran* (1934)
- *Richard Jefferies: A Study* (1934)
- *Pile That Thunder!* (1936)
- *The Splendour of Earth* (1936)
- *Mother of Ireland* (1936)
- *The Splendid Journey: Being a Tale of the First Days of the Cinema in Ireland* (1936)
- *Men of Vision: Pioneers in Education* (1937)
- *A Distant Voice: My Life with Francis MacManus* (1946)
- *The Love We Share: A Story of a Great Man and His Wife* (1950)
- *The Life and Death of a Gael: A Story of Conor O'Brien, Prince of Thomond* (1954)
- *The Man of Aran: The Life of Robert J. Flaherty* (1960)
- *Oliver St John Gogarty: A Biography* (1965)
- *The Great Morgan: The Life of J.P. Morgan, 1837–1913* (1969)
- *The Gaels: A History of the Gaels from Earliest Times to the Present* (1972)
- *Edward, Prince of Wales* (1973)
- *The Irish Dramatist: A History of the Dublin Stage* (1973)
- *James Joyce: A New Life* (1977)
- *Sean O'Casey: A Life* (1979)
- *Patrick Kavanagh: A Biography* (1980)
- *The Collected Letters of W.B. Yeats* (1984)
- *W.B. Yeats: A Life: The Arches of the Years* (1990)
- *The Life of W.B. Yeats: Volume Two: 1915-1939* (1994)
- *The Life of W.B. Yeats: Volume Three: 1939-1965* (1999)
Short stories
- "The Piper" (1934)
- "Pilgrim's Quest" (1934)
- "The Old Woman and the Sea" (1935)
- "The Young Man and the Sea" (1936)
- "The Island" (1937)
- "The Cottage" (1938)
- "The Hill" (1940)
- "The Valley" (1940)
- "The Wood" (1941)
- "The Sea" (1941)
- "The Sky" (1942)
- "The Stars" (1942)
Poetry
- *The White Stag* (1929)
- *The Dark Glass* (1931)
- *The Golden Treasury of Irish Verse* (1932)
- *The Dublin Book of Verse* (1932)
- *The Belfast Book of Verse* (1932)
- *The Cork Book of Verse* (1933)
- *The Galway Book of Verse* (1933)
- *The Limerick Book of Verse* (1933)
- *The Waterford Book of Verse* (1934)
- *The Sligo Book of Verse* (1934)
- *The Donegal Book of Verse* (1935)
- *The Kerry Book of Verse* (1935)
- *The Clare Book of Verse* (1936)
- *The Tipperary Book of Verse* (1936)
- *The Wicklow Book of Verse* (1936)
- *The Louth Book of Verse* (1937)
- *The Meath Book of Verse* (1937)
- *The Westmeath Book of Verse* (1937)
- *The King's County Book of Verse* (1937)
- *The Queen's County Book of Verse* (1937)
- *The Kildare Book of Verse* (1937)
- *The Carlow Book of Verse* (1938)
- *The Kilkenny Book of Verse* (1938)
- *The Wexford Book of Verse* (1938)
- *The Leitrim Book of Verse* (1938)
- *The Roscommon Book of Verse* (1938)
- *The Cavan Book of Verse* (1938)
- *The Monaghan Book of Verse* (1939)
- *The Fermanagh Book