Jonas of Bobbio and the Legacy of Columbanus: Sanctity and Community in the Seventh Century. By AlexanderO'Hara. Oxford Studies in Late Antiquity. Oxford and New York: Oxford University Press. 2018. xvi + 320 pp. £55. ISBN 9780190858001.Columbanus and the Peoples of Post‐Roman Europe. Edited by AlexanderO'Hara. Oxford Studies in Late Antiquity. Oxford and New York: Oxford University Press. 2018. xxiv + 344 pp. £55. ISBN 9780190857967.