Redux is more than just another state management library for javascript; it is a set of tools that help us implement a lean version of a frontend-oriented messaging system. If you are building a single page application with a lot of asynchronous operations that constantly change the state, you should consider adopting Redux as a solution. This book is an opinionated guide to Redux that focuses on design patterns, conventions, and practices. While some parts of the book describe known and accepted conventions, other parts are based on my own experience and personal perspective.