Fugue for a Darkening Island

Fugue for a Darkening Island (published in the US as Darkening Island) is a dystopian novel by Christopher Priest. First published in 1972, it describes a man's struggle to protect his family and himself in a near future England ravaged by civil war. The violence is brought about by a new far-right political party entering government, voted in to combat a massive influx of African refugees. Those refugees are aligned with the principal opposition faction, known as the Secessionists, leading to a multi-sided conflict.