The book Sams Tech Yourself Node.js in 24 Hours by George Ornbo, is a book that introduces us to this exciting new tool. As you understand from the title of the book, it consists of 24 chapters, each of which should take about an hour to complete. I did not do all the examples and then it is much faster to finish reading the book. It is about 440 pages long.
The book is largely platform independent. Which means that you can run the examples on Windows, Mac or Linux. This in itself demonstrates one of the strengths of Node.js. The author does not describe how to get Node.js to work on Windows Azure. The explanation is probably that the book was written before this was possible on Azure.
I personally had expected that it would have been more chapters on how to create Web services with Node.js. Many chapter is more about how to create web applications, which is not as interesting for me, in my situation.
I will certainly return to this book when I need to study any individual parts again. It will be available in my bookshelf for a long time. I highly recommend it.