G. A. Henty 
Lion of the North – A tale of the times of Gustavus Adolphus [EPUB ebook] 

G A Henty was a 19th century novelist. His best-known works are historical adventures. "The Lion of the North" is the story of Gustavus Adolphus a Scotsman fighting with the Army of the King of Sweden. The time setting is the first years of the Thirty Years War. .The main conflict in this war was the issue of religious freedom in gery. When the Emperor of Austria wanted to eliminate Protestant churches from gery the King of Sweden fought for the people of gery. Malcolm was a young lad whose intelligence and quick thinking helped him battle the enemy.