Camelot 30K is a hard science fiction novel written by the United States physicist Robert L. Forward. It was published in 1993 by Tor Books. The story mainly deals with the concept of human contact and interaction with a kingdom of intelligent alien life that dwells on a frozen world where the ambient temperature is only 30 K or −240 °C (hence the title of the book). In Camelot 30K, Forward uses exotic low-temperature chemistry to explain the aliens' unique biology and anatomy.