I can't speak specifically to how idiomatic it is as I've yet to read it, but I've heard http://www.amazon.com/Eloquent-Ruby-Addison-Wesley-Professional/dp/0321

I can't speak specifically to how idiomatic it is as I've yet to read it, but I've heard http://www.amazon.com/Eloquent-Ruby-Addison-Wesley-Professional/dp/0321584104 http://www.amazon.com/Eloquent-Ruby-Addison-Wesley-Professio... recommended a few times.