Father Dowling

• Her Death of Cold (1977)
• Bishop as Pawn (1978)
• The Seventh Station (1977)
• Lying Three (1979)
• The Second Vespers (1980)
• Thicker Than Water (1981)
• A Loss of Patients (1982)
• The Grass Widow (1983)
• Getting a Way with Murder (1984)
• Rest in Pieces (1985)
• The Basket Case (1987)
• Slight of Body (1989; aka Abracadaver)
• Four on the Floor (1989)
• Judas Priest (1991)
• Desert Sinner (1992)
• Seed of Doubt (1993)
• A Cardinal Offense (1994)
• The Tears of Things (1996)
• Grave Undertakings (2000)
• Triple Pursuit (2001)
• Prodigal Father (2002)
• Last Things (2003)
• Requiem for a Realtor (2004)
• Blood Ties (2005)
• The Prudence of Flesh (2006)
• The Widow's Mate (2007)
• Ash Wednesday (2008)
• The Wisdom of Father Dowling (2009)
• Stained Glass (2009)

Sister Mary Teresa (all as by Monica Quill)

• Not a Blessed Thing (1981)
• Let Us Pray (1982)
• And Then There Was Nun (1984)
• Nun of the Above (1985)
• Sine Qua Nun (1986)
• The Veil of Ignorance (1988)
• Sister Hood (1991)
• Nun Plussed (1993)
• Half Past Nun (1997)
• Death Takes the Veil (2001)

Andrew Broom

• Cause and Effect (1987)
• Body and Soil (1989)
• Savings and Loam (1990)
• Mom and Dead (1994)
• Law and Ardor (1995)
• Heirs and Parents (2000)

Notre Dame

• On This Rockne (1997)
• Lack of the Irish (1998)
• Irish Tenure (1999)
• The Book of Kills (2000)
• Emerald Aisle (2001)
• Celt and Pepper (2002)
• Irish Coffee (2003)
• Green Thumb (2004)
• Irish Gilt (2005)
• The Letter Killeth (2006)
• Irish Alibi (2007)
• The Green Revolution (2008)
• Sham Rock (2010)

Egidio Manfredi

• Still Life (2000)
• Sub Rosa (2001)

Rosary Chronicles

• The Third Revelation (2009)
• Relic of Time (2009)

Other novels

• Jolly Rogerson (1967)
• A Narrow Time (1969)
• The Priest (1973)
• The Gate of Heaven (1975)
• Rogerson at Bay (1976)
• Romanesque (1977)
• Spinnaker (1978)
• Quick as a Dodo (1978)
• The Noonday Devil (1985)
• Leave of Absence (1986)
• Frigor Mortis (1989)
• The Nominative Case (as by Edward Mackin) (1990)
• Easeful Death (1991)
• The Search Committee (1991)
• Infra Dig (1992)
• The Red Hat (1998)
• As Good As Dead (2002)
• The Ablative Case (2003)
• Slattery (2004)

Collections

• Father Brown, Father Dowling And Other Ecclesiastical Sleuths (with G. K. Chesterton and John Mortimer) (1992)
• Good Knights (2009)

Poetry

• Some Poems ((2005)

Anthologies edited

• Murder Most Divine (with Martin Harry Greenberg) (2000)
• Murder Most Catholic (with Martin Harry Greenberg) (2002)
• 11 of the Best Mystery Short Stories from Alfred Hitchcock's And Ellery Queen's Mystery Magazines (with Lawrence Block and Mary Higgins Clark) (2000)

Non fiction

• New Themes in Christian Philosophy (1969)
• Thomism in an Age of Renewal (1969)
• St. Thomas Aquinas (1977)
• A Catholic View (1986)
• A Handbook for Peeping Thomists (1990)
• A Theory of Practice (1992)
• The Question of Christian Ethics (1993)
• On There Being Only One Intellect (1993)
• Let's Write a Novel (1993)
• Let's Write Short Stories (1993)
• Introduction to the Language of the Church (1995)
• Essays on the Pursuit of Liberty (with John Gray) (1997)
• The Catholic Crisis Explained (1998)
• Aquinas and Analogy (1999)
• The Gifford Lectures, 1999–2000 (2001)
• A Spiritual Life (2003)
• Praeambula Fidei (2006)
• My Life and Pastimes (2006)
• Some Catholic Writers (2006)
• Dante and the Blessed Virgin (2010)