This book is structured to facilitate smooth learning, starting with the construction of a simple web server using Node.js, followed by building web applications and command-line applications, and finally, developing your own Node modules. You will learn fundamental topics such as interfacing with various databases like MySQL, MongoDB, CouchDB, and Redis, as well as integrating WebSockets and interfacing with protocols like SMTP. Furthermore, it covers data stream processing methods, security-conscious implementations, and various recipes for deploying developed applications in a production environment. The book introduces a wide range of third-party modules used in various scenarios, as well as the main core modules of Node. This book, compatible with Express 3, is a must-have for engineers who want to delve deep into Node.