This book provides a comprehensive and accessible exploration of how the legislative arm of government functions in Nigeria and within the ECOWAS sub-region. Drawing from historical evolution, constitutional foundations, and the intricate processes of lawmaking, Understanding the Inner-Workings of Nigeria Legislature and ECOWAS Parliament serves as both a guide and reference for students, legislators, political scientists, and civic enthusiasts. Stephen O. I. Orukpe Esq., a lawyer, consultant, and policy advocate, shares insights gained from his involvement with Nigeria's National Assembly and the ECOWAS Parliament. The book clarifies legislative procedures, the roles of committees, lobbying practices, and the institutional dynamics that define representative democracy in West Africa.