The Thin Red Line; and Blue Blood is a historical novel by Arthur Griffiths, first published in 1886. Set in mid-19th century Paris, it explores the dark underbelly of society through the lens of a murder investigation at the Hôtel Paradis, where Baron d'Enot is found dead. The narrative follows Rupert Gascoigne, an Englishman entangled in the case, as he navigates his troubled past and the complexities of human relationships. This work is notable for its rich historical detail and its contribution to the crime fiction genre.
