Catch-22 is a satirical, historical novel by the American author Joseph Heller. He began writing it in 1953, and the novel was first published in 1961. It is set during World War II in 1943 and is frequently cited as one of the great literary works of the twentieth century. It has a distinctive non-chronological style where events are described from different characters' points of view and out of sequence so that the time line develops along with the plot.
Among other things, Catch-22 is a general critique of bureaucratic operation and reasoning. Resulting from its specific use in the book, the phrase "Catch-22" is common idiomatic usage meaning "a no-win situation" or "a double bind" of any type. Within the book, "Catch-22" is a military rule, the self-contradictory circular logic that, for example, prevents anyone from avoiding combat missions.