"Hazai rejtelmek: Regény (1. kötet)" by Lajos Kuthy is a novel published in serialized form between 1846-1847. Inspired by Eugène Sue's "Les Mystères de Paris," this Hungarian mystery follows two feuding branches of the Szalárdy family in Pest and the Hungarian plains. When ambitious nobleman György conspires to destroy his brother Elek's orphaned son Ödön through false imprisonment and attempts on his sanity, the young heir must survive among criminals and beggars before uncovering dark family secrets that will restore justice.
Wikipedia page about this book: hu.wikipedia.org/wiki/Hazai_rejtelmek