PART I. SECURITY THEORY: Aspects of security in the history of Latvia / Guntis Zemītis. The basics of security theory / Leonīds Makans. PART II. SECURITY MANAGEMENT: Professional ethics / Ivita Kīsnica. PART III. SECURITY THREATS: Whistleblowing-growth of society / Jānis Veinbergs, Vilnis Veinbergs. PART V. PHYSICAL SECURITY: Video surveillance systems / Vilnis Veinbergs, Dainis Siliņš. Fire safety systems / Uģis Začs, Viktorija Ratačova. Access control system / Uģis Začs. Security guard management centre / Uģis Začs, Dzintars Rendenieks. PART VI. CYBERSECURITY: Cybersecurity: how to stay safe in the cyberspace / Elina Radionova-Girsa.