That Hideous Strength (1945) by C. S. Lewis takes place on Earth, but a hollow Moon is an important part of the novel's background, and is known by its inhabitants as "Sulva."
In That Hideous Strength, Dr. Elwin Ransom also ascends to heaven without dying.
At the climactic scene of C. S. Lewis's novel That Hideous Strength, when protagonists are preparing for a dangerous fateful encounter with their enemies, the character MacPhee, an Ulster Protestant, is shown humming "The Boyne Water".
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