Recently, I completed the 2nd Edition of Sams Teach Yourself Swift in 24 Hours. The book is available from Amazon, InformIT, and Barnes & Noble (as a special Custom Edition). It is an unbelievable honor to be able to not only be a published author, but to be writing about such an exciting new language, and one I'm very passionate about.
The book is geared towards someone who doesn't have any programming experience and wants to learn how to create Mac and iOS apps using Swift, also anyone who has programming experience and wants to add Swift to their tool belt. The book focuses more on the Swift language rather than anything particular to Mac or iOS app creation directly, but since the language was created to work interchangeably with Objective-C and Cocoa/Cocoa Touch, you should have no problem learning dedicated app development once learning the Swift language from this book.
The Swift language is very young still, and has a lot of room to grow. Currently, Swift version 2.2 is released, and 3.0 is shaping up in the public eye on GitHub. While it's growing, it is the best time to be learning the language, as this is the time when we can help shape the language the best as a community.
Thank you for your support and I hope you enjoy the book. If you have any comments and things you'd like to share with me about the book, please use the contact link above.