Working with Swift in Xcode 6.0: The single book that can get you on board swift swifty

Swift is an amazingly simple, yet powerful language introduced by Apple. You can learn the language for 2 years and still there will be something new to explore. This is just the tip of an iceberg covering the basic things that you must know when you start working with Swift Language. Once you have this knowledge, it will enable you to start coding using Swift and Xcode right away