This book is a graphic synthesis of a self-guided study of chattel slavery and the Atlantic slave trade. It is a 400-year timeline that displays total numbers of enslaved Africans embarked on ships. Each removable vessel card contains key historical details for a 50-year period. The accordion pocket structure is made with responsibly-sourced, organic cotton and natural indigo, recognizing that the histories of both cotton and indigo production are inextricably linked to the slave trade, the growth of our global economy, and a legacy of inhumane practices that sadly continue to this day.