Merge pull request #1153 from EdSancha/master

Added "Using Swift with Cocoa and Objective-C"

free-programming-books.md

@@ -1728,6 +1728,7 @@ See also [TeX](#tex)
 
 ### Swift
 * [The Swift Programming Language](https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11) (iBook)
+* [Using Swift with Cocoa and Objective-C](https://itunes.apple.com/us/book/using-swift-cocoa-objective/id888894773?mt=11) (iBook)
 
 
 ### Tcl