1. The Secret Six: John Brown and the Abolitionist Movement, Otto Scott, 1979.
Dr. North had this to say about this book:
The central figure was John Brown. Without him, there would have been no war, or at least not in 1861. He got what he wanted: abolition by force. Read Otto Scott’s book, The Secret Six. If you are really serious, read James Malin, the greatest of America’s ignored historians. But you have to be serious. He was painstaking. He was thorough.
2. John Brown and the Legend of Fifty-Six, James Malin, 1942.