This book starts by explaining the function of darts in a basic sloper, and demonstrates how to retain the fitting functions while changing the positions of the darts. The author shows how to divide one dart into several, replace a dart with a series of tucks, replace a dart with gathers, and even eliminate the dart. As the chapters progress, the alterations become more complex, for example, transferring the fit conferred by the basic dart into curved seams. The book is not intended to help in fitting clothes; one must already have the basic slopers for a bodice, skirt, or pants. The author's understanding of patterns and how they fit is highly accurate, and the suggestions for changes are innovative. I would say that the book deserves four or five stars for its theoretical analysis - my criticism is that it isn't very practical. Perhaps I'm being too demanding, for it may be impossible to teach pattern-making without hands-on demonstrations. The book's fashions are, unfortunately but unavoidably, dated. This, too, affects the extent to which the book is helpful in designing modern garments, and as a consequence I am, after reading it, still unsure of how I would change certain pattern styles. I nevertheless recommend the book for its value in understanding general principles of making a piece of flat cloth fit the contours of the body.