The book is available on both Amazon and Barnes & Noble. However, Packt Publishing really has the best deal going for the book right now. If you purchase the physical book, you get the ebook bundle for free! The ebook bundle contains PDF, EPUB and MOBI formats. This way you can access the book from your iPad, Kindle, Mac or whatever other device that you may have. Of course, if you only want the ebook bundle, you can purchase just that as well.
The EPUB and MOBI formats were just recently released. Therefore, if you purchased the book in the first week of its release, you may only have the PDF. You can log into your account on Packt Publishing’s website and download all the ebooks again.