7 Best-Selling Kotlin Books Millions Love

What started as a need to streamline Java developers' transition led Stefan Bocutiu and Stephen Samuel to craft this detailed Kotlin guide. You’ll find precise explanations on Kotlin’s unique features like null safety, destructuring expressions, and higher-order functions, alongside practical insights on integrating Kotlin with existing Java codebases. The book’s chapters on concurrency, microservices, and testing equip you with skills to build robust, modern applications. If you’re a Java developer moving toward Kotlin or a server-side developer eager to adopt this JVM language, this book offers a solid pathway without fluff or unnecessary complexity.

Drawing from their deep involvement in Kotlin's development, Dmitry Jemerov and Svetlana Isakova offer a guide tailored for experienced Java developers who want to master Kotlin's capabilities. The book walks you through Kotlin fundamentals, such as its type system and lambdas, and advances to practical topics like creating domain-specific languages and operator overloading. By bridging Java interoperability with Kotlin’s expressive syntax, it enables you to write cleaner, more idiomatic code for JVM and Android applications. You’ll find clear examples and explanations, especially in chapters on functional programming and Kotlin's unique conventions, making it ideal if you’re ready to elevate your JVM coding skills.

This tailored book explores battle-tested Kotlin programming methods that directly address your unique coding challenges. It reveals deeply practical insights drawn from popular Kotlin knowledge, customized to match your background and programming goals. By focusing on your specific interests, this personalized approach helps you develop mastery over idiomatic Kotlin usage, coroutines, functional programming patterns, and JVM interoperability. The content covers essential Kotlin features and advanced topics, combining reader-validated techniques with tailored explanations that make complex concepts accessible and relevant. Whether you aim to improve existing Kotlin skills or transition from Java, this book examines proven coding strategies to elevate your development practice effectively.

Aanand Shekhar Roy and Rashi Karanpuria tapped into the growing momentum behind Kotlin following its endorsement by the Android team to craft this recipe-driven guide. You’ll find practical, focused examples that walk you through key Kotlin language features, from basic syntax to more advanced programming constructs, enabling you to build Android applications with confidence. Chapters deliver hands-on tasks that clarify Kotlin’s interoperability with Java and its concise coding style, making it especially useful if you’re transitioning from Java or starting fresh on Android development. This book suits developers eager to deepen their Kotlin skills through clear recipes rather than abstract theory, though complete beginners might prefer a more gradual introduction.

Juan Antonio Medina Iglesias leverages two decades of software development and digital transformation experience to guide you through building scalable microservices with Kotlin. This book walks you through designing cloud-native, reactive microservices using Spring Boot 2.0 and WebFlux, emphasizing lean, maintainable code that integrates seamlessly with JVM ecosystems. You'll learn to implement non-blocking operations, manage reactive data streams from MongoDB, and scale services with Docker and Docker Swarm. If you aim to deepen your Kotlin skills while mastering modern microservices architecture, this book offers concrete frameworks and deployment strategies without unnecessary complexity.

When Mario Arias and Rivu Chakraborty wrote Functional Kotlin, they drew on their extensive software development experience to address a specific challenge: how Kotlin developers can harness functional programming principles effectively. This book teaches you to apply functional programming constructs like lambdas, immutability, recursion, and monads directly in Kotlin, with practical examples including the use of libraries such as Arrow and funKTionale. You’ll learn to integrate functional programming with object-oriented and reactive styles, enhancing performance and code clarity in real-world projects. If you’re comfortable with Kotlin but new to functional programming, this book guides you through these concepts in a way that connects theory to practical application.

This tailored book offers a focused, step-by-step journey through Kotlin designed to match your background and goals. It explores Kotlin's core concepts and features in daily segments, making the learning process manageable and engaging. By combining insights that millions of Kotlin learners have found valuable with your specific interests, it creates a learning path that feels both familiar and uniquely yours. This personalized approach helps you absorb key topics such as syntax, functional programming, and Android integration, all paced for rapid progress. Whether you're starting fresh or building on existing knowledge, this book examines Kotlin with an eye toward practical understanding and continual growth.

Michael Fordham's experience as a developer shines through in this hands-on guide to creating Android apps using Kotlin, a language officially endorsed by Google for Android development. You’ll start with setting up Android Studio and writing your first "hello world!" app, then progress to building more complex applications that adapt to various devices and orientations. The book’s strength lies in its practical approach, with clear screenshots and code examples that walk you through developing three progressively challenging apps. If you want a straightforward introduction to Kotlin app development that balances coding practice with essential Android concepts, this book will suit you well.

When Mike James set out to write this book, he aimed to bridge the gap between programmers familiar with basic concepts and those eager to master Kotlin's nuances beyond surface-level syntax. You learn not just the language features but also the subtle design choices that make Kotlin a compelling alternative to Java, especially for Android development. The book walks through object-oriented programming principles contextualized within Kotlin, helping you build more robust applications by understanding under-the-hood mechanics. If you have some programming basics but want to deepen your Kotlin skills with clear examples and thoughtful explanations, this guide fits the bill.