CV is a 1985 science fiction novel by American writer Damon Knight. It is the first novel in the "Sea Venture Trilogy", and was followed by The Observers (1988) and A Reasonable World (1991). The name of the novel derives from "The Sea Venture" ("CV" for short), an enormous, ocean-going habitat. During one of its first trips, the Sea Venture takes on a parasite, an alien symbiont that can pass fro... Wikipedia