At Google I/O 2017, Google announced that Kotlin is an official language of Android. Many Android developers have already switched to using Kotlin exclusively. But how do developers learning Kotlin? Here are some of my favorite Kotlin books.
Kotlin for Android Developers (Leanpub, $23.99)
New to Kotlin? Desiring to switch from Java to Kotlin? I recommend this book because it’s concise, informative and to-the-point.