San Manuel Bueno, mártir is a novella by Miguel de Unamuno that explores themes of faith, doubt, and the struggle for meaning in life. The story follows the character of Don Manuel, a priest who outwardly represents unwavering faith while secretly grappling with existential doubts about the afterlife. This duality reflects the broader cultural context of the Generación del 98, which questioned traditional beliefs and sought deeper understanding amidst societal changes.