"Kotlin Programming: The Big Nerd Ranch Guide" is a source of information for those who want to learn the Kotlin programming language from one of the most popular educational companies. The book provides the reader with an in-depth and understandable overview of the Kotlin language, including its core programming concepts and techniques. The authors explain how to create efficient code in Kotlin, providing examples and exercises to better understand the material. This book will be an excellent tool for both beginners and experienced programmers who want to deepen their knowledge of Kotlin."