A man who might be called Marcelo Mosén goes over the circumstances of his personal decline, a parallel of the sinking fortunes of a country that might well be Spain after the pandemic. After the death of his son, unemployed and homeless, Marcelo is drawn towards the populist movement, LUX. This movement gained power by appealing to people's primal emotions, and although Marcelo finds its ideals sometimes bring him deep internal conflict he can't resist its appeal. Written with subtlety and intelligence, "LUX" is a powerful novel about the rise of the far right fuelled by narratives of hate that multiply on social media; a mirror that shows us the first steps on the road to authoritarianism and keeps us on tenterhooks to the last page.