根据第二十二条军规，只有疯子才能免除飞行任务，但必须由本人提出申请；而能提出此申请的人必然没疯，所以他必须去飞行，去送死。

在英文中，“军规”和“圈套”是同一个词。小说的主人公约塞连是二战中一名美国轰炸兵，第二十二条军规使他不得不在生死线上苟且偷生，同时他也发现原来世界到处暗藏着这种荒唐的圈套。

“第二十二条军规”早已作为常用词被收入词典。而人类世界至今无法摆脱这个圈套的困扰。

《第二十二条军规》是“黑色幽默”文学鼻祖约瑟夫•海勒力作

"Catch-22" is like no other novel we have ever read. It has its own style, its own rationale, its own extraordinary character. It moves back and forth from hilarity to horror. It is outrageously funny and strangely affecting. It is totally original.
It is set in the closing months of World War II, in an American bomber squadron on a small island off Italy. Its hero is a bombardier named Yossarian, who is frantic and furious because thousands of people he hasn't even met keep trying to kill him. (He has decided to live forever even if he has to die in the attempt.)
His problem is Colonel Cathcart, who keeps raising the number of missions the men have to fly.
The others range from Lieutenant Milo Minderbinder, a dedicated entrepreneur (he bombs his own airfield when the Germans make him a reasonable offer: cost plus 6%), to the dead man in Yossarian's tent; from Major Major Major, whose tragedy is that he resembles Henry Fonda, to Nately's whore's kid sister; from Lieutenant Scheisskopf (he loves a parade) to Major -- de Coverley, whose face is so forbidding no one has ever dared ask him his first name; from Clevinger, who is lost in the clouds, to the soldier in white, who lies encased in bandages from head to toe and may not even be there at all; from Dori Duz, who does, to the wounded gunner Snowden, who lies dying in the tail of Yossarian's plane and at last reveals his terrifying secret.
"Catch-22" is a microcosm of the twentieth-century world as it might look to someone dangerously sane. It is a novel that lives and moves and grows with astonishing power and vitality. It is, we believe, one of the strongest creations of the mid-century.