This nine volume series is dedicated to the publication of documents and studies about the Congregation of the Holy Ghost and its works.
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The Spiritual Letters of the Venerable Francis Libermann Volume Five: Letters to Clergy and Religious (Nos. 185-274)
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 9
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The Spiritual Letters of the Venerable Francis Libermann Volume Four: Letters to Clergy and Religious (Nos. 76-184)
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 8
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The Spiritual Letters of the Venerable Francis Libermann Volume Three: Letters to Clergy and Religious (Nos. 1-75)
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 7
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The Spiritual Letters of the Venerable Francis Libermann Volume Two: Letters to People in the World
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 6
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The Spiritual Letters of the Venerable Francis Libermann Volume One: Letters to Religious Sisters and Aspirants
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 5
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Knaves or Knights? A History of the Spiritan Missionaries in Acadia and North America 1732-1839
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 4
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Les Écrits Spirituels de M. Claude-François Poullart des Places/The Spiritual Writings of Father Claude Francis Poullart des Places Founder of the Congregation of the Holy Ghost
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 3 in French and English
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The Spiritans: A History of the Congregation of the Holy Ghost
Henry J. Koren C.S.Sp.
Duquesne Studies Spiritan Series 1