API on Rails 6 is a comprehensive guide that explores the world of APIs and how to build them using the latest version of Ruby on Rails. This book is designed to help both novice and experienced developers create robust, scalable, and flexible APIs that can be consumed by a variety of clients.

The book begins by introducing the reader to the world of APIs, explaining what they are, and why they are essential in modern software development. It then goes on to provide a detailed overview of the Rails framework, highlighting its strengths, weaknesses, and how it can be used to build APIs.

The author then delves into the core concepts of API design, discussing topics such as REST, CRUD, authentication, and versioning. These concepts are explained in a clear and concise manner, making it easy for even novice developers to understand.

The book also covers best practices for building APIs, such as error handling, testing, and documentation. The author provides practical examples and code snippets throughout the book, allowing the reader to follow along and build their own APIs.

One of the standout features of API on Rails 6 is its coverage of advanced topics, such as GraphQL and API caching. These topics are explained in detail, providing the reader with a comprehensive understanding of how to build APIs that are both efficient and flexible.

The book also covers deployment and scaling, discussing different strategies for deploying APIs and how to scale them as traffic increases. This is a crucial topic for any developer building APIs that will be consumed by large numbers of clients.

Overall, API on Rails 6 is an excellent resource for anyone looking to build APIs using Ruby on Rails. The book is well-written, easy to follow, and provides a comprehensive overview of the topic. Whether you are a novice developer looking to learn about APIs or an experienced developer looking to take your skills to the next level, this book has something to offer.