"Learning API REST" is a book that provides a comprehensive introduction to building RESTful APIs. The book covers topics such as HTTP fundamentals, designing RESTful APIs, handling authentication and authorization, working with different data formats, testing APIs, and deploying APIs. It is written for developers who are new to building APIs or those who want to improve their skills in this area. The book uses practical examples and case studies to illustrate the concepts covered, and includes exercises and quizzes to reinforce learning. It also provides guidance on best practices and common pitfalls to avoid when building APIs. Overall, "Learning API REST" is a practical guide that equips developers with the knowledge and skills needed to build robust, scalable, and secure RESTful APIs.