I was truly stunned when I was given a copy of this book. My initial impression was the previous owner had dropped it in the toilet or spilt an entire pot of coffee over it and left it soaking overnight. It was in fact hand bound, presumably by the author - possibly as part of a class project, and consequently the book flops open wherever you put it. It is impossible to keep it closed. The text is devoid of any useful information and merely contains copies of equations with no explanation of their origin. The various typefaces used throughout the 50 pages or so suggest they were probably lifted from other texts. I would find it hard to recommend to anyone unless they had a passing interest in bookbinding