The term 'Work of Mythology' refers to the Edda, a collection of Old Norse poems and stories from Iceland. It is composed of two parts: the Poetic Edda and the Prose Edda. The Poetic Edda consists of mythological and heroic poems, while the Prose Edda contains a manual of poetics and a guide to Norse mythology. The Edda is an important source of information about Norse mythology and culture, and is considered one of the most important works of Old Norse literature.