This book serves as a practical guide to developing RESTful applications, designing RESTful architectures, and deploying RESTful services using Ruby on Rails. By the end of each chapter, the reader will have key takeaways for how to build and extend a multi-service platform spanning different devices. The book explains the power of RESTful development with Rails, illustrating how to build an architecture composed of different services accessing shared resources through a set of collaborating APIs and applications.