Complex sentence: His first book was "The Circassian Chief", a story published in 1844, and while still living in Oporto, he wrote "The Prime Minister", an historical novel, and "Lusitanian Sketches", descriptions of travels in Portugal.
Split into simpler sentences: His first book was "The Circassian Chief", a story published in 1844. While still living in Oporto, he wrote "The Prime Minister", a historical novel, and "Lusitanian Sketches", descriptions of travels in Portugal.