Imagine quantifying and visualizing your organization's cyber resilience as precisely as a stock market index. This book introduces that reality through the innovative Cyber Resilience Index, a unified metric that helps master threat-informed defense, transform cybersecurity strategy, and achieve efficient and effective threat management and communication. Through an engaging dialogue between a seasoned CISO Sophia and an innovative security leader Alex, you are taken on a journey from traditional, reactive defense to a proactive, resilience-focused strategy. The book masterfully blends technical depth with strategic insights, explaining the paradigm shift from asset-driven to threat-intelligence-driven security. You will learn how and why compliance is very important, but not enough to be truly cyber resilient; how to construct and leverage interoperable cyber value chains; how to go beyond continuous threat exposure management programs and truly master the threat-informed defense concepts; how to articulate value, and manage your cyber defense through a unified metric (much like traders use stock market charts to make successful trading decisions); and, lastly, what the evolution of cybersecurity leadership looks like ahead. Whether you're a cybersecurity professional, a subject matter expert (SME), a business leader, a security leader, or an expert in the field looking for battle-tested ways to sharpen or develop your leadership skills, this book provides a new lens through which to view the future of cybersecurity and leadership. Are you ready to reshape the chessboard of cyber defense? What You Will LearnQuantify and visualize your organization's cyber resilience using a unified metricTransition from reactive defense to proactive, threat-informed strategyBuild and optimize interoperable cyber value chainsArticulate cybersecurity value to boards and executivesEvolve beyond compliance-driven security to true cyber resilienceMake data-driven cybersecurity decisions using the Cyber Resilience IndexAnticipate and counter emerging cyber threatsTransform your security operations into a well-oiled, efficient machineEngage in hands-on experience through practical exercises at the end of each chapter, laying groundwork for mastering threat-informed defenseDevelop essential soft skills for cybersecurity leaders, illustrated through philosophical quotes and real-world experiencesCommunicate strategies crucial for successful cybersecurity transformationObtain leadership skills necessary to drive change in complex organizational environmentsGain career development insights for SMEs aspiring to become the next generation of cybersecurity leadersMeasure and manage defenses more efficiently than traditional risk management, and outdated risk matrices and risk registersBalance technical expertise with a strategic business mindset in cybersecurity leadershipStrategize for what lies ahead in the development of the cyber resilience index, namely, integrating AI and machine learning towards the formation of an AI-driven cyber value chain Who This Book Is ForCISOs and emerging leaders who want to sharpen their strategic edge; technical experts looking to grow into the leadership ladder; board members and executives who need to grasp cybersecurity at a strategic level; IT and security managers searching for fresh, data-driven and threat-informed approaches to fortify their defenses; and consultants who wish to gain cutting-edge insights to elevate their client offerings. Whether you're a veteran in the field, a curious academic, or a student of cybersecurity, this book provides a transformative view on the future of cyber defense, threat management, and cybersecurity leadership.