This work investigates the economic, logistical, and moral dimensions of the Atlantic slave trade, documenting the systematic exploitation of millions of human beings over four centuries. Daniel P. Mannix, in collaboration with Malcolm Cowley, utilizes historical records, ship logs, and contemporary accounts to reconstruct the mechanics of the slave trade. The text argues that the trade was a highly organized commercial enterprise driven by profit, which relied on the dehumanization of captives and the complicity of global maritime powers. By analyzing the transition from initial capture to the Middle Passage and final sale, the authors provide a comprehensive overview of the industry's operational scale.

Historians and educators frequently cite this work as a foundational, albeit sobering, account of the mechanics of the Atlantic slave trade. Readers often note the stark, clinical tone of the prose, which emphasizes the sheer scale of the human tragedy through documented historical evidence.