This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
I took a look at Go Tour.
Are there any exercises, perhaps with walk through solutions, that are a step above 'Hello World'?
Maybe a simple word game, math puzzle ala Project Euler, all written in idiomatic Go.