Clearly, this book slipped through the cracks in the scientific editor's desk, as it contains copious errors in not only math, but concepts also. The end of the chapter problems are ill-posed, as they often refer to 2-3 figures/examples within the chapter that require the student to make baseless assumptions in order to solve the problem.
Also, the low print quality and ever poorer figure quality make me wonder where my money went. Perhaps after a couple of revisions, a tight edit, and quality review this book will be worthy to be called a text.