	A shorter version of "Black Easter" was serialized as "Faust Aleph-Null" in "If" magazine, August–October 1967; the book edition retains the phrase as its subtitle. "Black Easter" and its sequel were later published as a single volume under the title "Black Easter and The Day After Judgement" (1980); a 1990 edition from Baen Books was renamed "The Devil's Day".