Compton Mackenzie 
Catholicism and Scotland [PDF ebook] 

Originally published in 1936 and authored by an ardent Scottish Nationalist and convert to Roman Catholicism, this concise book begins in the Gaelic era and charts the turbulent history of Catholicism in Scotland from then to the early 20th Century through the Norman Conquest of England and the coming of Saint Margaret. The contribution of the unbroken line of Stuart Kings to the national consciousness is emphasized and an outspoken account of the origins of John Knox’s Presbyterian movement given. The book also discusses the persecution of Catholic missionaries in the 17th and 18th centuries.