The Reach of the Aesthetic: Collected Essays on Art and Nature. Aldershot: Burlington, VT: Ashgate, 2001. xvi + 170 pp.
“Wonder’ and Other Essays: Eight Studies in Aesthetics and Neighbouring Fields. Edinburgh: Edinburgh University Press, 1984. 192 pp.
Christianity and Paradox: Critical Studies in Twentieth-Century Theology. London: C. A. Watts and Co., 1958; New York: Humanities Press, 1959; revised edn: London: C. A. Watts and Co., 1966; New York: Pegasus, 1968. ix + 217 pp.
Cosmology and Value: Studies in the Argumentation of Certain Late Sixteenth and Seventeenth Century Works of Philosophical and Literary Concerns. PhD Thesis, University of Aberdeen, 1955. 438 pp. (approx. 100,000 words)