Chapter 1, Introducing Kotlin, covers general features of the language and shows the reader how to install an IDE and the Kotlin compiler.

Chapter 2, Kotlin Basics, introduces the reader to the language syntax and explores the basic building blocks of the language: functions, variables, basic types, and so on.

Chapter 3, Classes and Object-Oriented Programming, focuses on the object-oriented features of the language. The chapter explores classes and interfaces and how they are extended and implemented. The chapter also shows some features that are specific to Kotlin, such as objects, companion objects, and sealed classes.

Chapter 4, Functions and Lambdas, shows how functions are first-class citizens in Kotlin. The chapter also shows Kotlin function features that are not present in Java, such as default argument values, named parameters, and function inlining.

Chapter 5, Advanced Kotlin, deals with more advanced features of Kotlin, such as operator overloading, generics, receiver functions, and constructs for multi-threaded programming.

Chapter 6, Kotlin Standard Library, shows some really useful functions that ship with Kotlin and also explores the Collections API.

Chapter 7, Coding a Dictionary App with Kotlin, is the chapter where we put Kotlin into practice. We summarize our learning from previous chapters and build a desktop dictionary application.