He has written books including "Scotland First: Truth and Consequences" (2004), "Global Scots: Voices from Afar" (with Kenny MacAskill) (2006) (published in the United Kingdom as "Global Scots: Making It in the Modern World"), "Wherever the Saltire Flies" (with Kenny MacAskill) (2006) and "Scotland: The Road Divides" (with Tom Brown) (2007).