G. Spiller

• A generation of religious progress
• Papers on Inter-Racial Problems (American Negro : His History & Literature Series 3)
• Ethical Movement in Great BritainA Documentary History
• Inter-Racial Problems; Papers From the First Universal Races Conference Held in London in 1911
• Papers on inter-racial problems communicated to the first universal races congress held at the University of London, July 26-29, 1911
• Poems of human service
• The Armaments Problem and a Durable Peace
• The origin and nature of man