The Prose Edda90 classic titles celebrating 90 years of Penguin Books Composed in Iceland in the 13th Century, The Prose Edda is the most renowned of all works of Scandinavian literature, taking readers on a voyage through an enthralling world of gods, giants, dwarfs and monsters. From the beginning of the universe to the dreaded Twilight of the Gods, this is the most extensive source of Norse mythology surviving today.