On a preliminary evaluation of the book, I am impressed with it. The book is very clearly laid out and though not a comment on content, I am quite a fan of the book's form factor. Starting with the first few chapters including a review of practical aerodynamics and performance methods, Nicolai writes in a manner very suitable to a person without any design experience particularly in aircraft. He gives a very good explanation of the overall design process and how his book fits into it.The book has a excellent mix of theory and practical application. Much theory is given to explain how and why things are the way they are but this is accompanied by real world data and practical application.My only gripe, though very petty in the overall scope of things, is the lack of mention of light sport aircraft which I believe is the best thing to happen to light general aviation in recent years.In his book, Nicolai also refers to Roskam and Raymer's text. Having Roskam's set of books, I can say that they are indeed an invaluable resources however, Nicolai's book is significantly better laid out and features somewhat better explanations of things. This is particularly true of the introductory chapters which I believe is sufficient to get the new aircraft designer on his feet with a clear idea of how to proceed. I can't exactly say the same for Roskam's Part I which involves less theory and more explanation of the use of formulae and method.Once I read the book in more depth, I will edit this review as necessary.