Kotlin Book

No Starch Press

Kotlin for the Curious: A Project-Based Introduction for the Intrepid Programmer

Manning

Kotlin in Action                                

Manning Publications

Kotlin in Action                                

BPB Publications

Kotlin Crash Course: Fast-track your programming skills with practical experience (English Edition)

Apogeo

Kotlin                                          

BPB Publications

Kotlin In-Depth: A Guide to a Multipurpose Programming Language for Server-Side, Front-End, Android, and Multiplatform Mobile (English Edition)

HOEPLI

Quaderno di tecnologie - kotlin                  

TypeAlias Studios LLC

Kotlin: An Illustrated Guide                    

O'Reilly Media

Spring Boot: Up and Running: Building Cloud Native Java and Kotlin Applications

Kotlin Handbook for Developers (English Edition)