What is the creative background of Catch-22?

Catch-22 was written in 196 1, which is the representative work of American black humor literature. Author joseph heller was born in a Jewish immigrant family on 1923. /kloc-joined the us air force at the age of 0/9, and majored in literature at new york university after the war. 1949 received a master's degree from Columbia university. Two of his early short stories, I don't love you anymore and Snow Castle, which were created by imitating Hemingway's style, were included in 1949 Best Short Stories edited by Martha Foley. Catch-22 was originally called Catch-18, but it was renamed because it overlapped with another writer's works. Heller spent six years writing this novel. The publication of the novel in the United States 196 1 received a mediocre response, and only more than 3,000 copies were sold in a whole year. However, the novel became an instant hit in Britain, ranking first in the bestseller list, which also made local readers in the United States re-understand the book. In 1970s, this book became one of the "classics" of American literature and was favored by young readers. Many liberal arts colleges include it in the required reading list of world literature. Heller has also become a world-class heavyweight writer.