The Life and Monastic Rule of St Columba of Iona (Apostle of Scotland) by St Adamnan of Iona

Columba, a prominent figure in the 'Age of Saints,' left his noble Irish roots to establish a significant monastery on Iona, which became pivotal in converting the Picts of Scotland. The site attracted numerous pilgrims and served as a consecration point for the King of Dalriada. Adomnán's Life provides a detailed account of Columba's life and his interactions with the monks, offering a vivid portrayal from the perspective of his successor, written a century posthumously.