Mattson has produced a horribly awkward text. The manner in which the book is written is far from engaging. The example problems are tediously uninteresting and explained without regard for the value of conceptual knowledge. Much of his terminology is obscure and he frequently makes vague references to previous parts of the text which can become impossible to follow. Very few of the problems have solutions; one is supposedly able to determine whether their answer is correct without any affirmation. The book redeems itself only by the many lists of real mathematics books which the author suggests as outside reading. Go read THESE books instead.