This curated list highlights top books for mastering Open-Source Intelligence (OSINT). The texts cover diverse aspects, from cybercrime investigation and strategic thinking to human rights documentation and digital privacy. Several books offer practical guidance on OSINT techniques, data analysis, and ethical considerations. Some focus on applying OSINT in specific domains like cybersecurity and corporate due diligence. Others explore the psychological dimensions of social engineering for ethical intelligence gathering. Overall, the collection equips readers with comprehensive knowledge for leveraging publicly available data across various fields.