This set of three books by C.S. Lewis, titled "The Space Trilogy," is a must-have for any book lover's collection. The series includes "Out of the Silent Planet," "Perelandra," and "That Hideous Strength," all published by Macmillan Publishing Co., Inc. in 1965. The books are in paperback format and are unabridged.

The novels are written in English and are intended for an adult audience. The genre of the books is a combination of spirituality, action, adventure, horror, religious & spiritual, magic, paranormal, politics & society, science fiction, mathematics & sciences, sociology, fairy tale, fantasy, art & culture, mystery, philosophy, and world literature & Classics. The books are vintage and were published in the United States.