As the Winter of 1775 approaches, the British have taken up residence in Boston. The fledgling Continental Army appears powerless to drive the redcoats back to England. Young Gabriel Cooper, a new aide-de-camp to General Washington, is learning the rigors of army life when he is called upon to journey with Henry Knox to retrieve Fort Ticonderoga's cannon. Nearly sixty cannons must be sledded through New England's winter wilderness back to Cambridge. The journey, filled with challenges, will be a daring trek across hundreds of miles to retrieve the one thing that can drive the British from Boston: a cannon! Peppered with historic personality, Cannon of Courage weaves fact with adventure to tell this remarkable story of American military achievement.