What this book is about. About prototyping. There are both the basics of theory and a huge number of practical recommendations. Todd Zaki Warfel shares his design philosophy, the tools of his craft and the best methods he knows that make things work. Albert Einstein once said: "In theory, things are the same. But in practice different." In this book, each chapter begins with a theory, and ends with a step-by-step practical guide to prototyping with a certain method, supplemented by useful tips and author's techniques.