Definitely Programming in Scala - http://www.artima.com/shop/programming_in_scala http://www.artima.com/shop/programming_in_scala. You might find some parts of

Definitely Programming in Scala - http://www.artima.com/shop/programming_in_scala http://www.artima.com/shop/programming_in_scala. You might find some parts of the book a little boring if you already have experience with functional programming, but it is one of the best books about programming languages I've read (I've only read the second edition, not the one that is available online, but I guess, the first one will be OK as an introduction too).