Edward St Aubyn "Mother's Milk" is the fourth in a series of five novels; it was released as a film in 2011, and as part of a TV series (of the whole quintet) with the title of "Patrick Melrose" in 2018.
Joseph Conrad's semi-autobiographical 1899 novella "Heart of Darkness" speaks of happenings during a voyage up the Congo River into the Congo Free State, comparing what with what?