Justin Marozzi's book, 'Captives and Companions: A History of Slavery and the Slave Trade in the Islamic World,' explores the complex legacy of bondage across the Middle East and North Africa. Marozzi examines various forms of enslavement, from eunuchs and harem women to mercenaries and laborers, highlighting regional differences. The book also touches upon the persistence of coercive labor systems, such as the 'kafala system' in Lebanon and Qatar, and the casual use of the term 'slave' in contemporary contexts.