This book is about building Angular applications using NGRX. To get the most out of the book you need a basic understanding of the Angular framework and should be able to scaffold an Angular application using the Angular-CLI or be able to set up an Angular project through Webpack, if that is your preferred way. It's good to have a decent understanding of JavaScript and TypeScript. Most of all a curious mind is really all you need. It's a good idea to have NodeJs installed on your machine.