Out of the Silent Planet is the first novel of a science fiction trilogy written by C. S. Lewis, sometimes referred to as the Space Trilogy, Ransom Trilogy or Cosmic Trilogy. The other volumes are Perelandra (also published as Voyage to Venus) and That Hideous Strength, and a fragment of a sequel was published posthumously as The Dark Tower. The trilogy was inspired and influenced by David Lindsay's A Voyage to Arcturus (1920).
According to biographer A. N. Wilson, Lewis wrote the novel after a conversation with J.R.R. Tolkien in which both men lamented the state of contemporary fiction. They agreed that Lewis would write a space-travel story, and Tolkien would write a time-travel one. Tolkien's story only exists as a fragment, published in The Lost Road and other writings (1987) edited by his son Christopher.
The Space Trilogy, Cosmic Trilogy or Ransom Trilogy is a trilogy of science fiction novels by C. S. Lewis, famous for his later series The Chronicles of Narnia. A philologist named Elwin Ransom is the hero of the first two novels and an important character in the third.
The books in the trilogy are:
- Out of the Silent Planet (1938), set mostly on Mars. In this book Elwin Ransom voyages to Mars and discovers that Earth is exiled from the rest of the solar system due to its fallen nature and is known as "the silent planet".
- Perelandra (1943), set mostly on Venus. Also known as Voyage to Venus. Here Dr Ransom journeys to an unspoiled Venus in which the first humanoids have just emerged.
- That Hideous Strength (1945), set on Earth. A scientific think tank called the N.I.C.E. is secretly in touch with demonic entities who plan to ravage and lay waste to planet Earth.