Zielenschemering is part of the Boeken der Kleine Zielen series by Louis Couperus. It delves into the lives of the Van Lowe family, focusing on the struggles of Gerrit and Ernst. Gerrit, a seemingly strong and healthy cavalry officer, grapples with inner weakness and illness, while Ernst faces haunting hallucinations. As misfortune befalls the family, each member copes in their own way, revealing the complexities of human nature and the resilience of familial bonds.