Several good books on programming for the Mac exist, but they assume that you already have some programming experience. This book doesn't. It teaches you the basics of programming, in particular Objective-C programming, us- ing Xcode. After some 5 chapters, you will be able to create a basic program without a Graphical User Interface (GUI). After a few more chapters, you will know how to create simple programs with a GUI. When you have finished this booklet, you will be ready for the above-mentioned more advanced books. You will have to study those too, because there is a lot to learn. For now though, don't worry because this book takes it easy.