Type-Driven Development with Idris, written by the creator of Idris, teaches you how to improve the performance and accuracy of your programs by taking advantage of a state-of-the-art type system. This book teaches you with Idris, a language designed from the very beginning to support type-driven development. In this book, you’ll learn how to manipulate types just like any other construct (numbers, strings, lists, etc.). You’ll see how to use type-driven development to build real-world software, as well as how to handle side-effects, state and concurrency, and interoperating with existing systems. By the end of this book, you will be able to develop robust and verified software in Idris and apply type-driven development methods to programming in other languages.