Fully annotated English translation of al-Jahiz's Kitab al-Tabassur bi al-Tijarah (The Book of Insight into Commerce). The translator has also added three appendices consisting of his translated excerpts from three important classical Islamic authors, al-Shaybani, al-Dimashqi and al-Lubudi in order to provide readers with an insightful overview of the business and commercial ethos of classical Islamic economic thought.