The original edition of this book was celebrated for its coverage of the central concepts of practical optimization techniques. This updated edition expands and illuminates the connection between the purely analytical character of an optimization problem, expressed by properties of the necessary conditions, and the behavior of algorithms used to solve a problem. Incorporating modern theoretical insights, this classic text is even more useful.
Overall, I did appreciate this textbook. It was well organized and easy to find what I needed. Unfortunately, it has a lot of holes. The phrase "left as a challenge to the reader" is used often, but also making logical jumps in proofs without fully explaining, or only showing one example.