COB, Mennonites and Friends or Quakers are the historic peace churches. When I was a student at Earlham seminary, my advisor was the OT prof and a COB member. We also had some classes at AMBS (Mennonite seminary).
My book on Christian Pacifism was just put into ebook form for Kindle and Nook:
30th Anniversary Edition of Christian Pacifism Launched
Originally published by Friends United Press, copyright 1981, Christian Pacifism: Fruit of the Narrow Way, by Michael [C] Snow [ESR, ‘81], is now in an “ebook