Chapter 1 provides an in-depth overview of cybersecurity knowledge drawn from disciplines including politics and international relations, law and computer science. The first part of this chapter is structured around the organising themes of definition, threat and response and provides an important foundation upon which subsequent theoretical and empirical work is based. This chapter identifies a broad homogeneity across this knowledge and demonstrates how this operates within a wider national security framing that reproduces the features, tropes and tactics found therein. However, the second part of this chapter goes beyond the "problem solving" conventions of cybersecurity knowledge and reveals a smaller body of critical and broadly constructivist research that investigates the same object but in a manner that eschews the commonplace agenda. By highlighting and exploring this research two things are achieved: first, my own study is situated within a wider academic body of work that sets out to investigate cybersecurity by utilising different ontological, epistemological and methodological assumptions; second, by revealing this heterogeneity I project a path forward for my own theoretical and empirical work that recognises the importance of a broader inter subjective process of knowledge construction that requires engagement with alternative sources, such as the internet security industry.