A Certain Curve of Horn traces the sable's emergence as a highly sought-after natural history prize before the First World War, and follows its struggle to survive in a war zone fought over by the troops of a half-dozen nations, and its transformation into a political symbol and conservation icon. As he follows the trail of this mysterious animal, Walker interweaves the stories of the adventurers, scientists, and warriors who have come under the thrall of the beast, and how their actions would shape the course of the history of the giant sable antelope and the history of the war-torn nation that is its home.

Culminating with a heart-pounding voyage into the heart of rebel-held Angola in search of the first scientific confirmation of the animal's existence in decades, A Certain Curve of Horn is a thrilling blend of history, natural science, and adventure—and a fascinating look into the world of a magnificent beast that has haunted the imaginations of hunters and naturalists around the globe for generations.