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This book is disappointing, definitively the worst in Engel's series. The usefulness and quality of the articles is certainly debatable, as it is also a very personal thing what one deems useful. However, the mere quality of the paper is an insult considering the price of the book. Other than all the "GPU Gem" books, this book is not published by Charles River Media, but by AK Peters. It is printed in India, and it shows.