Just before publication, the novel's title was changed to Catch-22 to avoid confusion with Leon Uris' new novel, Mila 18. The novel was published in hardback in 1961 to mixed reviews, with the Chicago Sun-Times calling it "the best American novel in years", while other critics derided it as "disorganized, unreadable, and crass". It sold only 30,000 hardback copies in the United States in its first year of publication. Reaction was very different in the UK, where, within one week of its publication, the novel was number one on the bestseller lists. In the years after its release in paperback in October 1962, however, Catch-22 caught the imaginations of many baby boomers, who identified with the novel's anti-war sentiments. The book went on to sell 10 million copies in the United States. The novel's title became a standard term in English and other languages for a dilemma with no easy way out. Now considered a classic, the book was listed at number 7 on Modern Library's list of the top 100 novels of the century. The United States Air Force Academy uses the novel to "help prospective officers recognize the dehumanizing aspects of bureaucracy."