Rollo in Rome by the American writer of children's books,Jacob Abbott.He was a prolific author, writing juvenile fiction, brief histories, biographies, religious books for the general reader, and a few works in popular science.His Rollo Books, such as Rollo at Work, Rollo at Play, Rollo in Europe, etc., are the best known of his writings, having as their chief characters a representative boy and his associates. In them Abbott did for one or two generations of young American readers a service not unlike that performed earlier, in England and America, by the authors of Evenings at Home, The History of Sandford and Merton, and the The Parent's Assistant.