Books about Science fiction (sorted alphabetically)
- Crystal Circe Henry Kuttner
- Crystal Crypt Philip K. Dick
- crystal ray Raymond Z. Gallun
- Crystal Sceptre: A Story of Adventure Philip Verrill Mighels
- Cube Root of Conquest Rog Phillips
- Cubs of the Wolf Raymond F. Jones
- Cuckoo Clock Wesley Barefoot
- Cue for Quiet T. L. Sherred
- Cully Jack Egan
- Cultural Exchange Jesse F. Bone
- Cultural Exchange Keith Laumer
- Cum Grano Salis Randall Garrett
- Customs Lounge Annie Proulx
- Cyber and Justice Holmes Frank Riley
- Cyberene Rog Phillips
- D-99: a science-fiction novel H. B. Fyfe
- Dalrymple's Equation Paul W. Fairman
- Damned If You Don't Randall Garrett
- Dancers Margaret St. Clair
- Danger! and Other Stories Arthur Conan Doyle
- Danger in Deep Space Carey Rockwell
- Danger in the Void Charles E. Fritch
- Dangerous Quarry Jim Harmon
- Dark Destiny Dwight V. Swain
- Dark Door Alan Edward Nourse