The Mabinogion tetralogy - Evangeline Walton

The Mabinogion is to Welsh mythology what the tales of Zeus, Hera, and Apollo are to Greek myth. these tales constitute a powerful work of the imagination, ranking with Tokien's Lord of the Rings novels and T.H. White's The Once and Future King. Evangeline Walton's compelling rendition of these classic, thrilling stories of magic, betrayal, lost love, and bitter retribution include the encounter between Prince Pwyll and Arawn, the God of Death, which Pwyll survives by agreeing to kill the one man that Death cannot fell, and the tale of bran the blessed and his family's epic struggle for the throne.
The Mabinogion is internationally recognized as the world's finest arc of Celtic mythology; Walton's vivid retelling introduces an ancient world of gods and monsters, heroes, kings and quests, making accessible one of the greatest fantasy sagas of all time.