John T. Koch is Research Professor at the University of Wales Centre for Advanced Welsh and Celtic Studies in Aberystwyth. A historical linguist specialising in early Celtic languages with a unique multidisciplinary profile, Koch’s research includes Indo-European origins of Celtic names, words, and grammar.
Sir Barry Cunliffe is Professor Emeritus of European Prehistory in the University of Oxford. A phenomenally prolific author and excavator, his publications include highly readable synthetic overviews that encompass long chronological sweeps of the archaeology of Britain, Eurasia, the Celtic world, and the Atlantic façade.