Which fictional planet does C.S. Lewis use as the setting of Perelandra?

Perelandra is the fictional planet where C.S. Lewis sets his novel Perelandra.

Published in 1943, Perelandra is the second book of Lewis’s Space Trilogy. Its protagonist, Elwin Ransom, travels from Earth to a world that corresponds to Venus. There he encounters a newly created environment, a Green Lady, and a tempter whose actions threaten the planet’s future.

Lewis’s planetary names are part of the trilogy’s invented cosmology. Malacandra is his name for Mars in Out of the Silent Planet, while Thulcandra is the name used for Earth. Perelandra is associated with Venus and is also the title used for the novel itself.

The book differs from conventional planetary adventure stories because its main conflict is theological and moral rather than military. Lewis combines medieval Christian ideas, imaginative language, and science-fiction travel to examine temptation and the possibility of an unfallen world.