Most Popular Books
- The Celts: History, Life, and Culture
- Tartessian: Celtic in the South-west at the Dawn of History (Celtic Studies Publications)
- Tartessian 2: The Inscription of Mesas Do Castelinho Ro and the Verbal Complex. Preliminaries to Historical Phonology
- Cunedda, Cynan, Cadwallon, Cynddylan: Four Welsh Poems and Britain 383–655
- An Atlas for Celtic Studies: Archaeology and Names in Ancient Europe and Early Medieval Ireland, Britain and Brittany
