Celts: The History and Legacy of One of the Oldest Cultures in Europe
The Celts: A Very Short Introduction (Very Short Introductions)
Britain Begins
The Discovery of Middle Earth: Mapping the Lost World of the Celts
Druids: A Very Short Introduction (Very Short Introductions)
Vikings, War, and the Fall of the Carolingians: A Critical English Translation of the Annals of Saint Vaast
Celtic Gods and Heroes (Celtic, Irish)
The Mammoth Book of Celtic Myths and Legends
By Steppe, Desert, and Ocean: The Birth of Eurasia
Empires and Barbarians: The Fall of Rome and the Birth of Europe