Encyclopedias, Almanacs, Transcripts, and Maps
- The Calendar Takes Shape in Mesopotamia
- The Cambridge Company
- The Castle of the Interior Man
- The Cavendish Experiment and the Quest to Determine the Gravitational Constant
- The Celestine Prophecy
- The Cereologist
- The Chinese Invent the Magnetic Compass
- The Chinese Invention of Gunpowder, Explosives, and Artillery and Their Impact on European Warfare
- The Christian Bible
- The Christian Parapsychologist
- The Christian Spiritualist
- The Churches' Fellowship of Psychical and Spiritual Studies
- The Circles Effect Research Unit (CERES)
- The Circular
- The Circumnavigation of the Earth by Balloon
- The Communication Revolution: Developments in Mass Publishing during the Nineteenth Century
- The Contributions of Albertus Magnus and the Development of Zoology during the Thirteenth through the Fifteenth Centuries
- The Contributions of Japanese Mathematicians since 1950
- The Count Ken Fan Club
- The Crop Watcher