Elevate Your Development with Effortless and Efficient API Communication. "Modern API Design with gRPC" is a definitive guide that empowers developers to leverage the full potential of gRPC in constructing efficient and scalable distributed systems. Beginning with an exploration of API evolution and its significance in software development, the book seamlessly transitions into the core concepts of gRPC architecture, protocol buffers, and stubs. Through practical examples and clear instructions, readers embark on a journey to establish their first gRPC server and client, laying a solid groundwork for further exploration. An API, or 'Application Programming Interface,' serves as a bridge between software components. I personally perceive the origin of APIs in the pursuit of 'Code Reusability,' akin to the motivation behind crafting functions. What sets APIs apart from functions is their inherent 'Remote-ness,' where APIs are stationed at network-accessible locations. This book caters to intermediate to advanced software developers and programmers aiming to enhance their expertise in modern API development using gRPC. Prior familiarity with fundamental software development concepts and proficiency in at least one programming language such as C++, Python, Ruby, Objective-C, PHP, C# are recommended to fully comprehend the concepts presented in this guide.