I work on web services for 2 years, bases on Java (back-end) and JSP / Javascript / Bootstrap (front end). I decided to throw myself on nodejs. And I chose to start my learning through this book. It begins with basic concepts for Take affected us gradually has critical frameworks like Express and proposed a complete webserver solution including databases management (MongoDB). It also presents the utility libraries as asynchronous methods and tools that make life easier for developers to learn how to debug, restart the server after changing the code ... After reading this book it possesses the essential basics to build a web server.