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The book was mentioned as giving very detailed accounts of the lives of the Jack the Ripper victims, all expertly sourced, though the host noted that regarding Mary Jane Kelly, the author states 'not a single statement made by her about her life prior to her arrival in london has ever been verified.'

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Referenced when discussing George Hutchinson's testimony about a suspect he claimed to see with Mary Jane Kelly, with Rumbelow theorizing that Hutchinson may have been acting out of 'spiteful resentment or jealousy' by falsely identifying someone he knew by sight.

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Highly recommended by the host, this book was quoted regarding Hutchinson's description of a suspect, saying it 'carefully replicated the costume and stance of the classic stage villain, sinister, black-moustached, bejeweled and arrogant.'

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Described as 'the great literary sensation of the 1880s' and a massive bestseller that was adapted for the stage during the Ripper murders. The hosts discussed how contemporary commentators, including W.T. Stead, explicitly compared Jack the Ripper to Mr. Hyde.

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Mentioned as Sherlock Holmes's debut in 1887, with the hosts discussing how Holmes represented scientific detection methods that were ahead of police procedure at the time, and noting the enduring fantasy that Holmes could have solved the Ripper case.

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Referenced as the source of Holmes's famous maxim 'when you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth,' published in 1890 after the Kelly murder.

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Described as 'a brilliant book' that suggests Sherlock Holmes is more closely associated with the Ripper's crimes, with the host noting there's 'a massive twist' but refusing to give it away.

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Discussed as a revolutionary 1886 study of sexual pathology that introduced terms like 'homosexuality,' 'sadism,' and 'lust murder' to English. The author became obsessed with Jack the Ripper, including him as 'case 17' in his chapter on lust murder.