Poor People, Dostoevsky's first novel written when the author was twenty-four, made him famous literally overnight. Although it shows the influence of Gogol's The Overcoat, this novel is written with a sympathy and understanding that enable it to stand on its own as an original work. So great was its impact upon the critics of the time that it became responsible for the literary term, "the natural school," which was applied to an entire group of Russian novels. After writing Poor People, Dostoevsky became involved with a group of radicals headed by the young and rich political dilettante, Mikhail Butashevich-Petrashevsky. As a result of this involvement, he was arrested with other members of the group and imprisoned in the Peter and Paul Fortress in Petersburg. While there he wrote A Little Hero, which is not only an amazingly frank portrait of Petrashevsky, but is also a fine analysis of the mentality of an eleven-year-old boy who falls in love with a young married woman.