Pedro Machado‘s Ocean of Trade:South Asian Merchants, Africa and the Indian Ocean, c.1750-1850 (Cambridge University Press, 2014) is a richly detailed and engaging account of Gujarati merchants and their role in the trade of textiles, ivory and slaves across the Indian Ocean. The book not only enhances our understanding of an under researched pan-continental trade network but also, through its sensitive treatment of local markets as drivers of merchants’ patterns, pushes us to re-examine our understanding of trading networks themselves.