In an era where Nigeria's economy dominates daily discussions across traditional and social media, newspaper stands, classrooms, marketplaces, seminars, conferences, and workplaces, the need for a comprehensive textbook becomes evident. As authors engaged in teaching, research, and consulting across institutions, we recognised critical gaps in existing narratives-both in the media and within textbooks-regarding the true structure of our nation's economy. This textbook represents a timely and essential contribution. It presents an updated and modern version of Nigeria's economic landscape, meticulously analysing the real-world economic situation. Within its pages, readers will find a thorough analysis of trends in the fundamental sectors: Agriculture, Industry, and Services. But this book goes beyond the surface, delving into sub-sectors to provide a nuanced understanding of each domain. Through verbal explanations complemented by diagrams and figures, we aim to demystify complex concepts and empower readers with actionable insights.