In May 2013 it was 1450 years since the arrival on Iona of Columba, the imperious and energetic Irishman of royal descent who founded its famous monastery and became Scotland's best-known Celtic saint. To celebrate this important anniversary, Iona Cathedral Trust has commissioned a new book by the historian Rosalind K. Marshall. Using a wide variety of sources and taking into account the results of the most recent historical and archaeological research,...