David Griffiths & Dawn Griffiths 
Head First Kotlin [PDF ebook] 
A Brain-Friendly Guide

What will you learn from this book?Head First Kotlin is a complete introduction to coding in Kotlin. This hands-on book helps you learn the Kotlin language with a unique method that goes beyond syntax and how-to manuals and teaches you how to think like a great Kotlin developer. Youll learn everything from language fundamentals to collections, generics, lambdas, and higher-order functions. Along the way, youll get to play with both object-oriented and functional programming. If you want to really understand Kotlin, this is the book for you.Why does this book look so different?Based on the latest research in cognitive science and learning theory, Head First Kotlin uses a visually rich format to engage your mind rather than a text-heavy approach that puts you to sleep. Why waste your time struggling with new concepts? This multisensory learning experience is designed for the way your brain really works.