Finkle, David, "For C. S. Lewis, Does Love Conquer All?" in New York Times, November 4, 1990, pp. HI, H5.

This article gives background on the relationship between Lewis and Gresham, how Nicholson came to write both the television movie and play, and the stage production.

Green, V. H. H. A History of Oxford University, B. T. Batsford, Ltd., 1974.

This nonfiction book gives the historical background at the institution where Lewis taught for many years and is used as a setting in Shadowlands.

Gresham, Douglas H., Lenten Lands, Macmillan, 1998.

This book by Joy Gresham's son who is a character in Shadowlands, describes his perspective on the relationship between his mother and Lewis.

Wilson, A. N., C. S. Lewis: A Biography, Collins, 1990.

This is the definitive biography of Lewis and includes information about his relationship with Gresham.