Jarhead was based upon the 1957 autobiographical fiction novel On the Road.
 Science fiction predicts or supposes technologies that are not realities at the time of the work's creation: Jules Verne's novel From the Earth to the Moon was published in 1865, but only in 1969 did astronauts Neil Armstrong and Buzz Aldrin become the first humans to land on the Moon
 However, in an interview, John Updike lamented that "the category of 'literary fiction' has sprung up recently to torment people like me who just set out to write books, and if anybody wanted to read them, terrific, the more the merrier

