"‘While at work on Humboldt’s Gift (1975), Bellow had developed an interest in the work of Rudolf Steiner, the founder of anthroposophy. And although he insisted, in a letter to the English barrister and “historian of consciousness” Owen Barfield, that he could not call himself a Steinerian, he was using – and refusing – the handle as a measure of knowledge rather than appetite." 
- Chavkin, Allan. 1984. “Bellow and English Romanticism.” Studies in the Literary Imagination 17:2, 7–18.
- Cronin, Gloria L. 1989. “Holy War against the Moderns: Saul Bellow’s Antimodernist Critique of Contemporary American Society.” Studies in American Jewish Literature 8:1, 77–94.
- Cronin, Gloria L. 2007. “Saul Bellow and the Holocaust Moment.” Saul Bellow Journal 23:1–2 (Winter), 95–116.
- Cronin, Gloria L. 2012. "Bellow’s Spiritual Quest," [Expositions 6.1 (2012) 43–51.
- Greg Bellow, Saul Bellow's Heart (Bloomsbury Publishing, 2013).
- James Atlas, Bellow (Faber and Faber, 2001).
Resources and articles
- zooey.wordpress Saul bellow’s letters, organizational web page, accessed June 4, 2013.