- "Scientific Humanism" (1898)
- "Den nya socialismen" (1899)
- "Socialism och demokrati i Europa" (1907)
- "As I Knew Them:Presidents and Politics From Grant to Coolidge" (1927)
Fiction-böcker:
- "På livets tröskel" (1889)
- "The Death-Wake" (1891)
- "Berättelsen om tusen" (1892)
- "The Despot of Scia" (1894)