The Eddas: The Poetic Edda by Saemund Sigfusson and The Prose Edda by Snorri Sturleson
The Poetic Edda, also known as Sæmundar Edda or the Elder Edda, is a collection of Old Norse poems from the Icelandic medieval manuscript Codex Regius ("Royal Book"). Along with the Prose Edda, the Poetic Edda is the most expansive source on Norse mythology. The first part of the Codex Regius preserves poems that narrate the creation and foretold destruction and rebirth of the Old Norse mythological world as well as individual myths about gods concerning Norse deities. The poems in the second part narrate legends about Norse heroes and heroines, such as Sigurd, Brynhildr and Gunnar. The Prose Edda, sometimes referred to as the Younger Edda or Snorri's Edda is an Icelandic manual of poetics which also contains many mythological stories. Its purpose was to enable Icelandic poets and readers to understand the subtleties of alliterative verse, and to grasp the mythological allusions behind the many kennings that were used in skaldic poetry.