A search of the SIDNEY computer interface for "gk4" in Blood of the Sacred, Blood of the Damned brings up an entry on ghosts, which Jane Jensen has remarked would have been the antagonists in her outline for a fourth entry to the series.
Rezultat potrage za "gk4" na računalnom sučelju SIDNEY, u nastavku Blood of the Sacred, Blood of the Damned daje zapis o duhovima koje je Jane Jensen naznačila kao antagoniste u svom konceptu za uvođenje četvrtog dijela u serijal.