Saxons, Vikings, and Celts: The Genetic Roots of Britain and Ireland

The Seven Daughters of Eve: The Science That Reveals Our Genetic Ancestry

DNA USA: A Genetic Portrait of America

Ancestral Journeys: The Peopling of Europe from the First Venturers to the Vikings (Revised Edition)

Celts: The History and Legacy of One of the Oldest Cultures in Europe

The Celts

In Search of Ancient Ireland: The Origins of the Irish from Neolithic Times to the Coming of the English

The Scots: A Genetic Journey

Neanderthals Rediscovered: How Modern Science Is Rewriting Their Story (Revised and Updated Edition)

Britain Begins