Shadows of heaven : religion and fantasy in the writing of C. S. Lewis, Charles Williams and J. R. R. Tolkien - Urang, Gunnar (London : SCM Press, 1971)
Keywords: Lewis, C. S. -- 1898-1963 -- Critisism and interpretation; Williams, Charles, -- 1886-1945 -- Critisism and interpretation; Tolkien, J. R. R. -- 1892-1973 -- Critisism and interpretation; Christian fiction, English -- History and criticism; Fantasy fiction, English -- History and criticism; Religion and literature -- Great Britain -- History -- 20th century; Fantasy in literature