- Babel and Bible: Three Lectures On the Significance of Assyriological Research for Religion, Embodying the Most Important Criticisms and the Author's Replies
- Wo Lag Das Paradies?
- Beitrage Zur Assyriologie Und Semitischen Sprachwissenschaft
- Whose Son Is Christ? Two Lectures On Progress In Religion (1908)
- Babel and Bible; two lectures delivered before the members of the Deutsche Orient-Gesellschaft in the presence of the German emperor