The substantially revised third edition of The Handbook of Security provides the most comprehensive analysis of scholarly security debates and issues to date. It reflects the developments in security technology, the convergence of the cyber and security worlds, and the fact that security management has become even more business focused. It covers newer topics like terrorism, violence, and cybercrime through various offence types such as commercial robbery and bribery. This handbook comprises mostly brand new chapters and a few thoroughly revised chapters, with discussions of the impact of the pandemic. It includes contributions from some of the world's leading scholars from an even broader geographic scale to critique the way security is provided and managed. It speaks to professionals working in security and students studying security-related courses. Chapter 5 is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.