Book excerpt: Trade, Circulation, and Flow in the Indian Ocean World is a collection which covers a long time span and diverse areas around the ocean. Many of the essays look at the Indian Ocean before Europeans arrived, reminding the reader that there was a cohesive Indian Ocean. This collection includes empirical studies and essays focused on particular area or production. The essays cover various aspects of trade and exchange, the Indian Ocean as a world-system, East African and Chinese connections with the Indian Ocean World, and the movement of people and ideas around the ocean.