premise: Uncommon Danger is the second novel by British thriller writer Eric Ambler, published in 1937. In his autobiography, "Here Lies", Ambler explains the original title was "Background To Danger", but his British publisher disliked the word 'background', so it was published in all English-speaking countries except the US as "Uncommon Danger".
hypothesis: Eric Ambler would have preferred his second novel to be titled "Background To Danger".
reason: Background To Danger was the original title that Eric chose for his novel, but it was changed by his publisher. This was probably not picked up by the system because it was not outright stated.