Marlene van Niekerk’s Agaat is a beautiful, complicated epic of agrarian life in South Africa from 1948 onward, and it explores the evolution of a relationship between two women who take care of one another. Agaat, for whom the book is named, is a nurse, farmhand, and nanny essential to the functioning of the farm, Grootmoedersdrift. The complex relationship between Agaat and the woman who takes her in, farm matron Milla de Wet, is the heart and soul of this book. Over the span of...