Perelandra is the name C.S. Lewis gives to Venus in his Space Trilogy.
The name appears most prominently in the second novel, Perelandra, published in 1943. Elwin Ransom travels there and finds a world unlike Earth, with floating islands, an aquatic environment, and inhabitants facing a decisive moral test.
Lewis’s trilogy uses a distinctive vocabulary for planets. Malacandra is Mars, the setting of Out of the Silent Planet, while Thulcandra is Earth. Perelandra is Venus, though the fictional planet differs radically from the scientifically known Venus.
Readers can therefore confuse the planetary names, especially Malacandra and Perelandra. The titles are also not interchangeable: Perelandra is both the name of the fictional Venus and the title of the trilogy’s middle novel.