The Prose Edda by Snorri Sturluson

The Prose Edda, also known as the Younger Edda, Snorri's Edda or simply Edda, is an Old Norse language Icelandic collection of four sections interspersed with excerpts from earlier skaldic and Eddic poetry containing tales from Norse mythology. The work is often assumed to be written by the Icelandic scholar and historian Snorri Sturluson around the year 1220.