Books about Science fiction (sorted alphabetically)
- caso extraño del Doctor Jekyll (Spanish) Robert Louis Stevenson
- Castaway Nelson S. Bond
- Castaways of Eros Nelson S. Bond
- Castle of Terror E. J. Liston
- Catalysis Poul Anderson
- Cat and Mouse Ralph Williams
- Category Phoenix Boyd Ellanby
- Catspaw George O. Smith
- Cause of Death Max Tadlock
- Cave-Dwellers of Saturn John Wiggin
- Cave Girl Edgar Rice Burroughs
- Cavern of the Shining Ones Hal K. Wells
- Caxton's Book: A Collection of Essays, Poems, Tales, and Sketches. W. H. Rhodes
- Ĉe la koro de la tero (Esperanto) Edgar Rice Burroughs
- Celebrity James McKimmey
- celestial blueprint Philip José Farmer
- Celestial Hammerlock Donald Colvin
- Centaurians: a novel Biagi
- Centauri Vengeance Stephen Marlowe
- Cerebrum Albert Teichner
- Certainty of a Future Life in Mars L. P. Gratacap
- Chain of Command Stephen Arr
- Chain Reaction Boyd Ellanby
- Chamber of Life Green Peyton
- Chameleon Man William P. McGivern