- Kotlin in Action, 2nd Ed. - Dmitry Jemerov & Svetlana Isakova - 2019 - Practical Kotlin with the patterns you'll use on real projects.
- Effective Kotlin, 2nd Ed. - Marcin Moskala - 2022 - Best practices and idioms for writing clean, safe, maintainable Kotlin.
- Kotlin Programming: The Big Nerd Ranch Guide, 2nd Ed. - David Greenhalgh, Josh Skeen - 2021 - From first principles to advanced Kotlin; hands-on examples.
- Programming Android with Kotlin - Pierre-Olivier Laurence, Amanda Hinchman-Dominguez et al. - 2021 - Concurrency, coroutines, and async in Kotlin for Android.
- Android Programming: The Big Nerd Ranch Guide, 5th Ed. - Bill Phillips, Chris Stewart, Kristin Marsicano - 2019 - Hands-on Android with Kotlin; coroutines and Jetpack Compose.
- Kotlin Cookbook - Ken Kousen - 2019 - Practical recipes for common Kotlin tasks; concise and to the point.
- Head First Kotlin - Dawn Griffiths, David Griffiths - 2019 - Brain-friendly introduction to Kotlin; visual and example-driven.