Mark Boulby, in Hermann Hesse: His Mind and Art, Cornell University Press, 1967.

A book-length study of Hesse's fiction with a chapter on Siddhartha that shows how Hesse's use of Indian themes promotes a Western, Christian world view.

Madison Brown, "Toward a Perspective for the Indian Element in Hermann Hesse's Siddhartha," in German Quarterly, Vol. 49, No. 2, March, 1976, pp. 191-202.

An analysis of how Siddhartha draws on themes from Indian religious and cultural traditions but revises them to promote Hesse's own world view.

Harish Chander, "Hermann Hesse's Siddhartha and the Doctrine of Anatman," in South Asian Review, Vol. 2, No. 8, July, 1979, pp. 60-66.

An analysis of how Siddhartha develops Buddhist religious themes regarding the universal soul.

Robert C. Conrad, "Hermann Hesse's Siddhartha, Eine indische Dichtung, as a Western Archetype," German Quarterly, Vol. 48, No. 4, Fall, 1975, pp. 358-69.

An analysis of how Hesse uses Indian themes to develop Western archetypal...