Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
This book is in better condition than I expected, which was a nice surprise. The material itself is fast paced, but if you're familiar with the program and how it's laid out, you should be fine. This product definitely exceeds expectations.
I ordered this book , not remembering we already had it at home. Key books not only fulfilled the order with speed , accuracy, and good pricing, but also gladly accepted my return, with ease, pleasantness, and accuracy! No hassles, but more than that. They have delighted me with their service!!! Please use them.