In addition to the completed and shipping Programming in Scala book from Artima, there are three others in the works:

Great news.

If I’m going to be picky, I’d say I’m a little concerned all these look like they are language books, rather than “activity books”. What I mean by that is there’s no “Database Persistence using Scala” or “Building Fast Web Sites Quickly with Scala” or “Asynchronous Messaging with Scala”… you get the idea. Sure, you can just get on and use the Java way, but the idiomatic Scala approach is what I’m looking for.