Proper Reading Material

I have been using Playgrounds ever since suppport has been put on Mac and it is going well. Very good program. I want to be able to expand my knowledge of Swift code in the form of textbooks along with my practical training in Playgrounds and Xcode. Any good materials that would better serve me in learning app development? Any and all suggestions would help greatly. Know that i am fairly new to coding in general and Swift is my first language. Thanks to you all!

Apple provides ebooks/ibooks (vs. physical books, if that's what you're asking), check the App Store/iTunes U.


Example: https://books.apple.com/us/book/app-development-with-swift/id1219117996


I would not recommend any printed materials in this example, as the tools/SDKs are continually evolving and printed materials are routinely out of date as a result.

Proper Reading Material
 
 
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