Coffin, Charles. The Life and Services of Major General John Thomas. First. New York: Egbert, Hovey & King, 1844.
The Coffin biography is the best available and can be found on-line.
Broadwater, Robert P. American Generals of the Revolutionary War: A Biographical Dictionary. Jefferson: McFarland, 2012.
Headley, J.T. Washington and His Generals. Home Library. New York: A. L. Burt Company, n.d.
Memoirs and Papers
John Thomas papers, Massachusetts Historical Society.
Memorial at Fort Chambly, Quebec
Memorial at the grave site of John Thomas (died June 2, 1776) and many other Continental Army soldiers who died of smallpox during the American Retreat from Canada in 1776.