Although its authors are not so much concerned with historians' expertise, the well-organized {\it Math through the ages} deserves attention from both historians of mathematics and mathematics teachers who are interested in bringing history into their classrooms. By humanizing mathematics in terms of its evolutionary aspects, the book is successful in providing, as claims its subtitle, ``a gentle history for teachers and others''. In so doing, the authors also try to share their broad intellectual exploration by referring to 141 bibliographies on specialized historiography, history of mathematics and its relevance to mathematics teaching as well as popular mathematics. The major part of the book is, however, the 25 historical sketches, which all end with ``Questions'' and (assigned) ``Projects'' in order to encourage the readers to better understand the historical episodes. In fact, the sketches are not only about basic concepts like fractional numbers, zero, negative numbers, $\pi$, and complex numbers, and topics like metric measurement, symbolism, solving equations, Pythagorean theorem, Euclid's plane geometry, coordinate geometry, and trigonometric functions but also about subjects like Fermat's last theorem, projective geometry, non-Euclidean geometry, infinity and the theory of sets. Moreover, the friendly and accessible writing of the book makes it clear that the last category, once appropriately applied, can help to enhance teachers' pedagogical content knowledge, namely integrating their teaching and their reflection on branches of mathematical knowledge.