December 7 Birthday: St. Columoille

Columoille, saint 
Dec. 7, 521-June 9, 597

Across a Dark and Wild Sea by Don Brown, illustrated by Deborah Nadel (Roaring Brook, 2002)

This is a story of an Irish monk of the sixth century also known as St. Columba. He established a monastery and copied books and illuminated manuscripts.

The Catholic Encyclopedia posts a biography of St. Columa on its website.