This book will take you on a journey through the most valuable design patterns in React, demonstrating how to apply design patterns and best practices in real-life situations. This book will help make your applications more flexible, perform better, and will make them easier to maintain, while giving your workflow a huge boost by improving speed, but crucially without affecting quality.

We'll begin by understanding the internals of React, before gradually moving on to writing clean and maintainable code. We'll build components that are reusable across the application, structure applications, and create forms that actually work. 

We will then style React components and optimize them to make applications faster and more responsive. Finally, we'll write tests effectively, and you'll learn how to contribute to React and its ecosystem.

By the end of the book, you'll be saved from a lot of trial and error and developmental headaches, and you will be on the road to becoming a React expert.