This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Lately I'm considering exploring Node.js technology.
Well, Node.js will require that you do know JS the language well enough. That, and event handling (a Node.js program is basically a big event loop).