The Times stated: "Both have central characters who are using their wits to escape the aerial carnage; both are haunted by an omnipresent injured airman, invisible inside a white body cast". Stating he had never read Falstein's novel, or heard of him, Heller said: "My book came out in 1961[;] I find it funny that nobody else has noticed any similarities, including Falstein himself, who died just last year".
The book that spawned the request was written by Louis Falstein and titled The Sky Is a Lonely Place in Britain and Face of a Hero in the United States. Falstein's novel was available two years before Heller wrote the first chapter of Catch-22 (1953).