The tall ship Friends Good Will and the War of 1812 on the Great Lakes come to vivid life in this well-researched historical volume by James Spurr. Book 1 Great Lakes, Great Guns Historical Series, Sworn for Mackinaw begins in pre-war Detroit with business and family man Oliver Williams and his brother-in-law, Captain William Lee. Both men stake their futures on a new venture: the fast sailing sloop Friends Good Will. When war erupts it causes tension between friends, strains on blood bonds, and the unforeseen peril of carrying a secret cargo that may change the entire course of history.