The Security Economics Knowledge Guide introduces some of the most impactful ways economics has helped to shed light on cybersecurity problems and frame solutions that blend private and public action. The guide focuses on the organizational, rather than individual, perspective, which is where the majority of scholarly activity has focused. The author of this knowledge guides shares canonical security failures from an economic perspective, describes key measurement challenges, reviews firm-level approaches to improving cybersecurity, and discusses available public-policy options. We speak with CyBOK Security Economics author Tyler Moore for an overview of the topic.