In 'Mastering State-of-the-Art API Design and Development (2025)', author Vikram Singh Sankhala provides developers with a comprehensive, forward-looking guide to building robust, scalable, and secure APIs. This book dives deep into the latest industry trends and leading platforms shaping API development as of 2025, covering both REST and GraphQL paradigms. It offers practical insights and actionable strategies for navigating the full API lifecycle, from initial design and modeling to deployment, security, and ongoing management, ensuring developers are equipped with the most current knowledge and tools. The book explores essential topics including modern design-first approaches with tools like OpenAPI/Swagger and Stoplight, effective documentation strategies using platforms such as ReadMe and Redocly, and advanced testing and mocking techniques with Postman and Insomnia. It also covers key aspects of API security, management (Kong, Apigee), analytics, and emerging trends like GraphQL Federation and AI-enhanced design. With a strong focus on understanding and application, this guide empowers developers to select the right tools, implement best practices, and build state-of-the-art APIs that meet the demands of modern software architecture.