Context:

Referred to as 'whose book on the Jack the Ripper case is the definitive history' - discussed as an authoritative source on the Jack the Ripper murders

Context:

Explicitly mentioned as 'her book The Five, which is brilliant on the lives of the victims' - discussed in relation to the thesis that Ripper victims were killed while sleeping

Context:

Referenced as a Sherlock Holmes story featuring a bloodhound called Toby, used as comparison when discussing the police's failed experiment with bloodhounds

Context:

Described as 'a very notorious, I think, mad book about Jack the Ripper' - discussed in relation to conspiracy theories involving Masons and the royal family

Context:

Mentioned as upcoming topic for discussion in relation to the cultural hinterland of the Ripper murders and the duality of Victorian society

Context:

Referred to as 'the enormous graphic novel by Alan Moore' - mentioned in connection with the famous 'From Hell' letter sent to George Lusk