Books in Science Fiction (sorted alphabetically)
- Coffin for Jacob Edward W. Ludwig
- Cogito, Ergo Sum John Foster West
- Collector's Item Evelyn E. Smith
- Collector's Item Robert F. Young
- Colors of Space Marion Zimmer Bradley
- Columbus of Space Garrett Putman Serviss
- Comet's Burial Raymond Z. Gallun
- Coming Attraction Fritz Leiber
- Coming of the Ice Green Peyton
- Common Denominator John D. MacDonald
- Common Man Mack Reynolds
- Compatible Richard Rein Smith
- Competition James Causey
- Conditionally Human Walter M. Miller
- Confidence Game Jim Harmon
- Confidence Game James McKimmey
- Consignment Alan Edward Nourse
- Contagion Katherine MacLean
- Control Group Roger D. Aycock
- Cool War Andrew Fetler
- Copper-Clad World Harl Vincent
- Cosmic Computer H. Beam Piper
- Cosmic Express Jack Williamson
- Cost of Living Robert Sheckley
- Country of the Blind, and Other Stories H. G. Wells