The stories dealt with are those in which Elwin Ransom is a character, the three usually called the "space trilogy": Out of the Silent Planet, Perelandra, and That Hideous Strength--and the time-fragment entitled The Dark Tower. Lengthy chapters are devoted to each of the four Ransom stories. The book presents a study of Lewis, the nature of science fiction, the nature of Lewis's "Arcadian" science fiction and his (and its) place in English literary history.