Every border is a world of stories, not just a line on a map or a political frontier. This book introduces readers to the worlds of African borderlands by following border-jumpers, asylum seekers, return migrants, and contraband traders across five borders in eastern and southern Africa. Through vivid, character-driven narratives drawn from ethnographic fieldwork and relationships spanning fifteen years, African Border Worlds challenges three common assumptions about African borders: that they are arbitrary colonial impositions, that they are peripheral spaces of poverty and marginalization, and that they should be thought of in terms of binaries such as good/bad or open/closed. Instead, it shows that borders are dynamic, contested, and full of paradox. They are sites of violence and engines of opportunity, zones of exclusion and platforms for reinvention. The people at the center of these stories are active participants in shaping how borders work, not simply passive victims of border regimes. Grounding the analysis in his own experiences of border-crossing, anthropologist Daniel K. Thompson also reflects on what it means to conduct research across borders defined by deep global inequalities, and on the relationships that make such work possible and morally consequential.