Eserleri
Düzyazı
The Allegory of Love: A Study in Medieval Tradition (1936)
Rehabilitations and other essays (1939)
The Personal Heresy: A Controversy (1939)
The Problem of Pain (1940)
A Preface to Paradise Lost (1942)
The Abolition of Man (1943)
Beyond Personality (1944)
Miracles: A Preliminary Study (1947)
Arthurian Torso (1948)
Mere Christianity (1952)
English Literature in the Sixteenth Century Excluding Drama (1954)
Major British Writers, Vol I (1954)
Surprised by Joy: The Shape of My Early Life (1955)
Reflections on the Psalms (1958)
The Four Loves (1960)
Studies in Words (1960)
An Experiment in Criticism (1961)
A Grief Observed (1961; ilk defa "N. W. Clerk" takma adıyla basıldı)
The Discarded Image: An Introduction to Medieval and Renaissance Literature (1964)
God in the Dock: Essays on Theology and Ethics (1970)
Studies in Medieval and Renaissance Literature (1966)
Spenser's Images of Life (1967)
Letters to an American Lady (1967)
Selected Literary Essays (1969)
Letters to Malcolm: Chiefly on Prayer (1972)
Of Other Worlds (1982; makaleler)
All My Road Before Me: The Diary of C. S. Lewis 1922-27 (1993)
Essay Collection: Literature, Philosophy and Short Stories (2000)
Essay Collection: Faith, Christianity and the Church (2000)
Collected Letters, Vol. I: Family Letters 1905-1931 (2000)
Collected Letters, Vol. II: Books, Broadcasts and War 1931-1949 (2004)
Kurgu
The Pilgrim's Regress (1933)
Space Trilogy
Out of the Silent Planet (1938)
Perelandra (1943)
That Hideous Strength (1946)
The Screwtape Letters (1942)
The Great Divorce (1945)
The Chronicles of Narnia
The Lion, the Witch and the Wardrobe (1950)
Prince Caspian (1951)
The Voyage of the Dawn Treader (1952)
The Silver Chair (1953)
The Horse and His Boy (1954)
The Magician's Nephew (1955)
The Last Battle (1956)
Till We Have Faces (1956)
Letters to Malcolm: Chiefly on Prayer (1963)
The Dark Tower and other stories (1977)
Boxen: The Imaginary World of the Young C. S. Lewis (1985)
Şiir
Spirits in Bondage (1919; "Clive Hamilton" takma adıyla basıldı)
Dymer (1926; "Clive Hamilton" takma adıyla basıldı)
Narrative Poems (1969)
The Collected Poems of C. S. Lewis (1994)