I have it and recommend it. Each chapter is devoted to a major type of sweater. Within each chapter are charts based on size, guage, cardigan vs. pullover, crewneck vs. other kinds of necklines. (There are also charts for yardage estimates based on guage and size.) The charts are guides as to how you shape the sweater. What I found that was really helpful were the Copycat patterns. I used a raglan Copycat pattern which was written for only one size. Using the pattern, I had to follow the charts and take my own measurements to custom fit and rewrite the pattern for my size. Because of this experience, I now have more confidence in tweaking patterns to fit my size, and I feel that I can change things if I want.
The only thing I didn't like about the book was the glossary: it was incomplete as a reference IMHO. But, the glossary is not what I bought the book for.