- Socialism As It Is: A Survey of the World-Wide Revolutionary Movement
- The Socialism of To-Day: A Source-Book of the Present Position and Recent Devolopmet of the Socialist and Labor Parties in All Countries, Consisting Mainly of Original Documents
- Russia's Message The People Against the Czar
- The Socialism of To-Day: A Source-Book of the Present Position and Recent Devolopmet of the Socialist and Labor Parties in All Countries, Consi
- Socialism as it is: a survey of the world-wide revolutionary movement