This book is not "for Dummies". It assumes that you already have some knowledge of structured programming languages (i.e. Pascal). For example, this book spends four well-written pages explaining everything you need to know about functions. If you don't know what a function is, this will clearly not be enough. However, if you do know about functions, this book will not drone on and on for an entire chapter or two on the subject like some of the foot-crunching tomes the size of an encyclopdia. The book is expensive ($40) for its size (approx. 250pgs.), but it is worth every penny. To quote the authors: "C is not a big language, and it is not served well by a big book." As a bonus, almost anything you need to know about C can be found in seconds using the excellent index. It should be noted that this is a language reference and will NOT tell you how to use your editing environment or compiler. In summary, intermediate or advanced programmers should be able to learn C with reasonable proficiency in a short amount of time.