Nigeria, Africa, and Global Power Competition offers a timely analysis of the geopolitical rivalry involving the United States, Israel, and Iran and its wider implications for Nigeria and Africa within the global political economy. While often framed as a Middle Eastern issue, this rivalry shapes global energy markets, security systems, and diplomatic alignments with significant consequences for African states. The book examines how these global tensions influence African economies through oil price volatility, inflationary pressures, currency instability, trade disruptions, and fluctuating foreign investment. It also highlights security spillovers such as transnational terrorism, Sahel instability, and cross-border conflict diffusion. Using an exploratory qualitative approach and drawing on scholarly literature, policy reports, and institutional documents, the study traces the channels through which geopolitical competition is transmitted to Africa's development space. Theoretical grounding in Realism, Dependency Theory, Neo-colonialism, and Critical Geopolitics provides a framework for understanding Africa's structural position within global power hierarchies. The book argues that Africa is not merely a passive recipient of external shocks but is embedded within global systems of power and resource dependence. It further emphasizes that Nigeria and Africa must adopt strategic adaptation measures, including economic diversification, energy transition, strengthened regional cooperation, and improved policy coordination to reduce vulnerability and enhance global agency. This book is essential reading for scholars, policymakers, diplomats, and students of international relations, African studies, and global political economy seeking to understand how distant geopolitical rivalries shape African realities in an interconnected world.