Part-1 of the book introduces Node fundamentals in detail covering a chat application in chapter 2,which I felt was tough to follow, being newbie to Node.But Part-2 is the heart of the book covering Node's low-level API's in detail, all the middle-ware's, and then coverage of Web Frameworks Connect and Express is comprehensive and easy to follow.After covering Part-2, revisiting Part-1, clarified all my doubts, the Chapter 2 Chat application was easy to understand now.
It's clear and concise coverage, combined with an easy writing style allows for quick reading and understanding.Overall this book offers a well rounded and highly approachable introduction to developing applications with Node. It's probably too advanced for the absolute beginner, but prior experience in web application development, combined with basic installation of server applications should be adequate.
The only thing where I was expecting more information was the real world use cases and scenarios where we can use Node.js.