- Journey to Beatrice
- Dante's Commedia: Elements of Structure
- Journey to Beatrice: Dante Studies V2
- The Divine Comedy: Purgatorio in Two Volumes: Purgatorio 1. Italian Text and Translation & Purgatorio 2. Commentary - Translated, with a Commentary by Charles S. Singleton (2-Volume Set)
- Dante Studies, Volume 1, Commedia: Elements of Structure