Trying to learn node: which books are too old to learn from in 2015?

I am quite familiar with Javascript, so last week started learning http://nodeschool.io/ However, as I want to dig deeper, I looking to read some kind of book. What is your recomendations in 2015? Btw, maybe you can suggest other node.js learning resources?

Submitted December 04, 2015 at 04:21PM by Gruzdaz