Kotlin in Action,Kotlin in Action: Jemerov, Dmitry, Isakova, Svetlana: 9781617293290: Amazon.com: Books,Kotlin in Action, Second Edition,Programming Android with Kotlin: Achieving Structured Concurrency with Coroutines: Laurence, Pierre-Olivier, Hinchman-Dominguez, Amanda, Dunn, Mike, ,Kotlin 1.0 Released: Pragmatic Language for the JVM and Android | The Kotlin Blog,