Which C.S. Lewis novel features the characters Mark and Jane Studdock?

That Hideous Strength features Mark and Jane Studdock.

Published in 1945, That Hideous Strength is the third novel in C.S. Lewis’s Space Trilogy, following Out of the Silent Planet and Perelandra. Unlike the first two books, much of the action takes place on Earth. Mark is a sociologist drawn into the bureaucratic organization known as N.I.C.E., while Jane experiences disturbing dreams and becomes connected with a resistance to the organization.

The novel combines science fiction, academic satire, mythology, and Christian moral themes. N.I.C.E. presents technological and social planning as progress, but Lewis portrays its ambition as a threat to human freedom and moral judgment. The book also draws on Arthurian motifs and ideas associated with Lewis’s friend Charles Williams.

The title is taken from a line in the traditional English poem “The Song of the Quern,” translated by Lewis. The novel is sometimes misremembered as a direct planetary adventure, but its setting and concerns are primarily terrestrial.