"Los cien mil hijos de San Luis" by Benito Pérez Galdós is a historical novel written in February 1877. The sixth installment of Galdós's second series of national episodes, it depicts the intrigues of King Fernando VII and his inner circle as they facilitate a French invasion of Spain in 1823. Told through a fictional manuscript by Jenara Baraona, the narrative blends historical figures with literary characters in a romantic thriller plot, exploring the end of the constitutional period and the beginning of an era of terror. (This is an automatically generated summary.)