Exploring Cloud-Native Ecosystems takes readers on a journey through one of the most transformative paradigms of our time. Cloud computing is no longer just a tool—it has become a cultural and organizational shift that reshapes the way companies innovate, grow, and operate. Structured in four parts, the book offers both clarity and depth: Part I introduces the foundations of the cloud—its history, evolution, service and deployment models (IaaS, PaaS, SaaS; public, private, hybrid)—and explores the regulatory frameworks that govern adoption. Part II is a practical toolkit covering DevOps, FinOps, Agile, ITIL4, and other frameworks that guide organizations through effective cloud adoption. Part III explores cloud-native informational ecosystems , where infrastructures, applications, and data converge into resilient and scalable systems. Blueprints, landing zones, and value chains are introduced to show how to design modern architectures. Part IV focuses on people and organizations: competence centers, cultural change, and collaboration models that make the cloud-native journey sustainable and future-ready. At the end of each section, a holistic vision expands the perspective, while dialogues with two recurring characters—Old Birba, the mentor, and Jenny, the curious learner—make complex topics more engaging and accessible. This book is intended for a wide audience: IT professionals, managers, compliance and security experts, and anyone interested in understanding how cloud-native ecosystems enable agility, efficiency, and innovation. It is not just a technical manual but an invitation to reflect on the role of technology in our organizations and society. Exploring Cloud-Native Ecosystems is a guide, a map, and a conversation starter—a way to navigate the opportunities and challenges of building smarter, more sustainable, and more human technological ecosystems.