blog.typesafe.com/free-pdf-from-typesafe-scala-for-the-impatien-64715Here is some great copy:

"I wrote this book for impatient readers who want to start programming with Scala right away. I assume you know Java, C#, or C++, and I won't bore you with explaining variables, loops, or classes. I won't exhaustively list all features of the language, I won't lecture you about the superiority of one paradigm over another,
and I won't make you suffer through long and contrived examples. Instead, you will get the information that you need in compact chunks that you can read and review as needed."