With the background of World War II, Catch-22 presents the story of the inside life of the U.S. Army Air Force on the small island of Pianosa near the Italian coast in the Mediterranean Sea. The plots are mainly unfolded around Yossarian and his friends’ experience of an absurd existence defined by bureaucracy and violence: they are merely inhuman resources in the eyes of their blindly ambitious superior officers. Catch-22 derived from Heller’s personal experience at war. Unlike other anti-war novels, Catch-22 has transcended the genre--not just about the criticism on the military bureaucracy and the war, but on the absurdity in the deteriorating life itself.