I'm a professional software developer who is still supporting clients using Swift 2. However, I'd like to be getting up to speed on Swift 3 since clearly it is the wave of the future.
My copy of iBooks (on my Mac, dunno about my iOS devices) is currently the Swift 2 book, and when I go to the bookstore, it shows the Swift 3 version with a read button. When I click that it opens the Swift 2 book.
I see from another question that I can right-click on my Swift 2 book in iBooks, delete it, and then re-download from the app store in order to update to the Swift 3 book.
However, I need both versions to show up in my library, clearly named, and need to be able to open one or the other at will.
How do I accomplish this?