At Night All Blood is Black by David Diop

Alfa Ndiaye is among the many Senegalese men that fight for France in WW1. When his fellow “Chocolat” soldier and friend Mademba dies a grizzly death, Ndiaye is transformed into a monster of sorts. He sneaks around at night, killing German soldiers, bringing back their hands as a memento, ravenous for death. A harrowing yet necessary read, telling the long-overdue stories of African soldiers that fought for colonial powers in the war.