Lady Gregory's retelling opens Ireland's mythic world in two great movements: the divine age of the Tuatha de Danaan and the heroic age of Finn and the Fianna. From the gods' mist-shrouded arrival, their sacred treasures, and their mastery of poetry, healing, craft, and battle, the stories move into the fierce, forest-haunted realm celebrated by W.B. Yeats, where Finn seems to live almost as an equal among supernatural powers. Across these legends come omens, wonders, love, lamentation, and wars that test courage to the limit: young champions drowning in combat, the Fianna holding off foreign kings, the King of Lochlann and the King of the World bringing devastation, and Finn's warriors—Oisin, Fergus, Conan, Caoilte, and others—winning glory at terrible cost. Amid the slaughter, women, musicians, and healers search the dead and mourn the fallen, while the book itself answers critics of Irish literature by asserting the imagination, beauty, and spiritual depth of these ancient tales and preserving them for new generations. This edition has been fully restored with modern typesetting, custom cover design.