Book excerpt: This volume views the study of disease as essential to understanding the key historical developments underpinning the foundation of contemporary Indian Ocean World (IOW) societies. The interplay between disease and climatic conditions, natural and manmade crises and disasters, human migration and trade in the IOW reveals a wide range of perceptions about disease etiologies and epidemiologies, and debates over the origin, dispersion and impact of disease form a central focus in these essays. Incorporating a wide scope of academic and scientific angles including history, social and medical anthropology, archaeology, epidemiology and paleopathology, this collection focuses on diseases that spread across time, space and cultures. It scrutinizes disease as an object, and engages with the subjectivities of afflicted inhabitants of, and travellers to, the IOW.