How do Spanish writers of the 19th and 20th century define and represent madness, a basic and controversial aspect of world culture, and how do the different conceptions of madness intersect with love, religion, politics, and other literary themes in Spanish society? This multi-author book analyzes the theme of madness in formative masterpieces of Spanish literature of the 19th and 20th century through the use of relevant critical and theoretical approaches. In this context, authors studied in this book include Juan Valera, Leopoldo Alas Clarín, Emilia Pardo Bazán, Caterina Albert, Benito Pérez Galdós, Miguel de Unamuno, and Juan Goytisolo, among others.