Adomnan's life of Columba is the collected stories about the life of Saint Columba written on Iona by his successor about 100 years after the saint's death. The stories cover Columba's miracles, prophesies and visions of angels.
For me the main interest in the book is the picture of Iona it gives. It is an ideal book to read if you are about to visit Iona or have just visited, as the places mentioned and the scenes described often have remained unchanged since Columba's time.
Only a quarter of the 400+ page book is taken up with "The Life Columba", there is a 100 page scholarly and readable introduction, extensive notes and a full bibliography. (Stuart)
Some of Bede's most glowing praise is for the Celtic Saints but it is always tempered with a reminder that their practices, such as dating Easter, did not agree with the Roman practice. (Stuart)