4First published in 1996, this study outlines the history of the ecclesiastical familia of Colum Cille in Ireland and North Britain in the era between the sixth and twelfth centuries, Three major works of hagiography were produced within the Columban familia during that time, the Latin Vita Columbae, and Lives of Adomnán and of Colum Cille in the Irish language .These texts, elucidated from linguistic and literary viewpoints, are set in the context of the history of the Columban community, and thereby are made to provide enhanced insights into the actions and attitudes of the community at significant stages in its past. This new reprint includes an afterword from the author, surveying important research developments in the interval since the book was first published, and indicating directions for further research.