I had the pleasure and the privilege of reading the original book, particularly some of the important chapters of the book on Fracture Mechanics by Dr. Nestor Perez. I find the book, in general, very well written for the academicians as well as for the practitioners in the field of engineering fracture mechanics. The language is simple, clear and to the point. Each chapter is developed in such a way that the mathematical treatment supports the main physical mechanism of fracture. The equations are arranged in an orderly fashion in harmony with the descriptive concepts of a phenomenon that is highly complex, very nonlinear and often unpredictable. The main objective of a mathematical analysis is to explain and clarify a physical phenomenon, and definitely not to jeopardize it by undue and unwanted complexity at the cost of brevity. If this is true for a textbook or any treatise for that matter, Dr. Perez’s book has done the job quite elegantly.