You can get a 50% off discount on the PDF version of the book if you send in proof of purchase of your print copy of 2D iOS & tvOS Games by Tutorials. Please send amazon receipt or shipping confirmation notice to support@razeware.com and we’ll send you a 50% off discount code to purchase the PDF version of the book.
Since the PDF of 2D iOS & tvOS Games by Tutorials written for Swift 2 comes with a free update to the new version, this will give you access to download the latest edition of the book written for Swift 3.