The Sagas of Olaf Tryggvason and of Harald The Tyrant (Harald Haardraade) by Werenskiold, Erik Theodor Egedius, Halfdan Snorri Sturluson Hearn, Ethel Harriet Krogh, Christian Storm, Gustav Wetlesen, Wilhelm Laurits Munthe, Gerhard Peterssen, Hjalmar Eilif Emanuel
 is a Project Gutenberg book, now on Github.