I've never really read the nordic/saxon Sagas. I love the books by countess Markeivcz on the Irish Celts and Tuatha de Danann. They're basically the oral tradition written down and translated. Very much mythical though.
For something a little more factual, you should try the various medieval chronicles. They're far from the truth in many cases but enjoyable, in a simialar vein to the sagas.