This book critically examines contemporary security challenges, focusing on predictive policing, counterterrorism, deterrence theory, and drug trafficking, with Nigeria as a case study. It evaluates the effectiveness of predictive policing technologies in Lagos State, highlighting benefits such as hotspot identification and challenges like privacy concerns. The study explores military narratives in counterterrorism, emphasizing the role of community trust and local intelligence. Revisiting deterrence theory, it finds limited deterrent effects on drug trafficking. Lastly, it traces the evolution of drug trafficking in Nigeria, revealing adaptive strategies by traffickers and systemic enforcement gaps. Through qualitative analysis, the book offers a comprehensive, evidence-based framework to inform security policies and practices. It advocates a multifaceted approach combining enforcement, ethical technology use, community engagement, and international cooperation to address crime and insecurity effectively. Essential for security professionals, law enforcement, and policymakers, the book provides actionable insights for combating organized crime and enhancing national security.