History and Non-Fiction:
- "Lights and Shadows: The Story of Charles Carroll of Carrollton" (1928)
- "The Builders of the Bay State" (1931)
- "The Colonial American in Literature" (1937)
- "A Pilgrim's Progress" (1941)
- "Penelope's Web: The Life and Times of Penelope Barker, 1775-1818" (1947)
Literature and Criticism:
- "New England Legends" (1931)
- "Readings from the Early Roman Catholic Literature of England" (1932)
- "The Sacred Poets of the English Renaissance" (1937)
- "The Power and the Glory" (1938)
- "A Preface to Shakespeare" (1939)
- "A Primer of Aesthetics" (1950)
Catholic Spirituality:
- "The Foundations of Catholic Belief" (1948)
- "The Joyful Mysteries" (1949)
- "The Sorrowful Mysteries" (1950)
- "The Glorious Mysteries" (1951)
- "The Christ Child: A Book of Daily Meditations for Advent and Christmas" (1952)
- "The Trinity" (1954)
Spalding's works have been praised for their scholarly rigor, engaging writing style, and deep spiritual insight. She has been recognized as a significant contributor to American Catholic literature and thought, and her writings continue to be read and enjoyed by readers today.