Which book in the "African Trilogy" takes it's title from the line in WB Yeats poem, "The Second Coming"?
No Longer at Ease:  The novel is the second work in what is sometimes referred to as the "African trilogy", following "Things Fall Apart" and preceding "Arrow of God". " Things Fall Apart:  The title of the novel comes from a line in W. B. Yeats' poem "The Second Coming".
Things Fall Apart