This eBook provides a comprehensive examination of the modern attack surface and the evolving strategies required to defend against it. It outlines the shift from traditional endpoint security to a more integrated defense that encompasses various domains, including identities, cloud environments, and AI agents. The text details how adversaries exploit fragmented defenses and emphasizes the need for organizations to adopt a unified approach to security. Key topics include the role of endpoints as attack vectors, the significance of identity security, and the challenges posed by cloud and SaaS applications. The eBook also discusses the emerging risks associated with AI agents and the necessity for organizations to secure their digital infrastructure holistically. By understanding the interconnected nature of modern threats, security leaders can better prepare their defenses and mitigate risks effectively.