Krzysztof Zanussi has written On editing an amateur film (1968), Discourse on an amateur film (1978) and a book of memoirs The Time to Die (1997). He appeared as himself in Camera Buff (1979), a film about an amateur film maker, directed by his friend Krzysztof Kieślowski. His film The Constant Factor (1980) (Polish: Constans) received the Jury Prize at the 1980 Cannes Film Festival. During the 1980s, he spent much of his time in the West.