The book was easy to read and learn from. It draws parallels with electric field "stuff" which really adds to the understanding you gain from the math discussions, even if you are not already familiar with electric fields. The book provides concise discussions on the div, grad, and curl operators; however, it is not organized like a reference book or text book (e.g. it lacks tables of these operators expressed in cylindrical and spherical coordinates). I highly recommend reading through this book if you are at all confused about what div, grad, and curl are, the differences between them, or why you should be interested in them.