This is a good book about Node.js. It's well-organized, steps you through Node, from installation to building some moderately involved apps. The writing style is easy to follow but not dummed-down, like some intro books can get. The chapters each cover a distinct chunk of what you need to know, so if you need a guide to Node, I'd recommend it.
I didn't give it five stars because I'm not a fan of the 'XYZ in 24 hours' style and this one fell short for some of the same reasons as the others. They have to work hard to break things into 24 units, and have to bluff on some. The 'hour' on CoffeeScript, for example, seemed like filler and has no specific Node.js connection. Besides, I finished that one in 20 minutes!