Essays presented to Otakar Odložilík in honour of his seventieth birthday(edited by Brock and H. Gordon Skilling) (1970). Pioneers of the Peaceable Kingdom (1970). Twentieth-century pacifism (1970). Pacifism in Europe to 1914 (1972). Nationalism and populism in partitioned Poland: Selected essays (1973). The Slovak National Awakening (1976). Polish Revolutionary Populism (1977). Fighting Joe Martin : founder of the Liberal Party in the West : a blow-by-blow account (1981). The roots of war resistance : pacifism from the early church to Tolstoy (1981). The Mahatma and mother India : essays on Gandhiʾs non-violence and nationalism (1983). The military question in the early church : a selected bibliography of a century’s scholarship 1888-1987 (1988). The Quaker peace testimony 1660 to 1914 (1990). Freedom from war : nonsectarian pacifism, 1814-1914 (1991). Studies in Peace History (1991). Folk Cultures and Little Peoples : Aspects of National Awakening in East Central Europe (1992). Freedom from violence : sectarian nonresistance from the Middle Ages to the Great War (1992). A brief history of pacifism from Jesus to Tolstoy (1992). Records of conscience : three autobiographical narratives by conscientious objectors 1665-1865 (1993). Pacifism to 1914 : an overview (1994). Bart de Ligt (1885-1938) : overdenkingen bij het herlezen van "La paix créatrice” na 51 jaar = Reflections on rereading "La paix créatrice” after fifty-one years. (1994). Mahatma Gandhi as a linguistic nationalist (1995). Testimonies of conscience sent from the Soviet Union to the War Resisters International, 1923-1929 (editor) (1997). Varieties of pacifism : a survey from antiquity to the outset of the twentieth century (1998). Challenge to Mars : essays on pacifism from 1918 to 1945 (with Thomas P. Socknat (1999). Pacifism in the Twentieth century (with Nigel Young) (1999). The riddle of St. Maximilian of Tebessa (2000). Pacifism since 1914 : an annotated reading list (2000). Life in a penal battalion of the Imperial Russian Army : the Tolstoyan N.T. Iziumchenko’s story (edited by Peter Brock and John L.H. Keep; translated by Keep) (2001). From Wandsworth to Wormwood Scrubs : one man's view of prison. (2000). Published in Britain as The Black Flower : One Man’s memory of prison sixty years after (2001). Life in an Austro-Hungarian military prison : the Slovak Tolstoyan Dr. Albert Škarvan’s story translated from the Slovak and edited by Brock (2002). Liberty and conscience : a documentary history of the experiences of conscientious objectors in America through the Civil War (2002).