**Getting Started with OAuth 2.0** by Ryan Boyd is a comprehensive guide that simplifies the complex world of OAuth 2.0. This book, published by O'Reilly Media, provides a clear and concise introduction to OAuth 2.0, a protocol used for secure authorization across numerous APIs.

Whether you are a web developer or a mobile app developer, this book will help you understand how OAuth 2.0 allows your applications to securely access users' data, such as user profiles, photos, videos, and contact lists. The book guides you through the implementation of OAuth 2.0 in various contexts, including server-side web applications, client-side apps, and mobile apps.

You will learn how to apply the Authorization Code flow, a key component of OAuth 2.0, to integrate data from different business applications. This book explains the unique challenges faced by native mobile apps when using OAuth 2.0 compared to mobile web apps. It further explores OpenID Connect, a protocol that simplifies authentication by eliminating the need to build your own authentication system.

With clear explanations, code examples, and step-by-step instructions, this book is an invaluable resource for anyone looking to understand and utilize OAuth 2.0 for secure data access and user experience enhancement.