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Described as 'the definitive book' on the Ripper case and 'by far the most scholarly and sort of serious book on this.' The hosts reference it multiple times throughout the episode for expert analysis on the murders, witnesses, and suspects.

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Referenced when discussing theories about how the victims were killed. The hosts note that Rubenhold 'believes all the women were killed as they slept' and mention that she doesn't include Mrs. Long's testimony in her book.

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Described as 'Jerry White's brilliant book on 19th century London' when discussing the undercurrent of anti-semitism in East End neighborhoods during this period and the context of Jewish immigration.