In the afterword to the Science Fiction Book Club 2-in-1 edition of "The Atrocity Archives" and "The Jennifer Morgue", Stross notes that friends warned him against reading the novel "Declare" while he was working on "The Atrocity Archives" due to the strong parallels between the two works. Stross also mentioned the similarities between the novel and the "Delta Green" role-playing game, similarities referenced in the short story "Pimpf" included with "The Jennifer Morgue"; "Delta Green" is also about elite government conspiracies working against villains who attempt to wield power derived from the Mythos, as well as rival conspiracies.