Sergiy Klymchuk is an Associate Professor of the School of Computing and Mathematical Sciences at the Auckland University of Technology, New Zealand. He has 32 years broad experience teaching university mathematics in different countries. His PhD (1988) was in differential equations. At present his main research interests are in mathematics education. He is a Fellow of the Institute of Mathematics and its Applications (IMA) based in the UK and an Associate Editor of the international journal Teaching Mathematics and its Applications. He is a member of the Royal Society of New Zealand (RSNZ). He is also a member of three affiliated groups of the International Commission on Mathematical Instruction (ICMI) of the International Mathematical Union (IMU): the International Community of Teachers of Mathematical Modelling and Applications (ICTMA), the International Group for the Psychology of Mathematics Education (PME) and the International Commission for the Study and Improvement of Mathematics Education (CIEAEM). He has more than 180 publications including several books on popular mathematics and science that have been, or are being, published in 11 countries. His book Counterexamples in Calculus, also published by the MAA, received an Outstanding Academic Title award from Choice magazine of the American Library Association in 2010.