Although it's stated that the book is not for beginners, I needed to get a grasp on C# and quickly. My exposure to OOP made the reading less daunting. Most of the other books out there are tomes, but this book is concise with enough examples to illustrate the featured concepts (I admit I had to read certain parts multiple times to absorb what was being conveyed). I needed a book I could easily carry around with me and serve as quick and comprehensive reference and this one was it. The book concepts, despite the title, do apply to C# 3.5.