Alfred S. Posamentier has published over sixty books in the area of mathematics and mathematics education, including, The Joy of Geometry, Math Makers: The Lives and Works of 50 Famous Mathematicians; The Mathematics of Everyday Life (with Christian Spreitzer); The Joy of Mathematics (with Robert Geretschl&aauml;ger, Charles Li, and Christian Spreitzer); and The Circle: A Mathematical Exploration beyond the Line (with Robert Geretschl&aauml;ger). After having been on the faculty of the City College of the City University of New York for forty years, where he was a professor of mathematics education and dean of the School of Education, he subsequently held the same positions at Mercy College, New York, for five years. He was also executive director for internationalization and sponsored programs at Long Island University, New York. He is currently a Distinguished Lecturer at the New York City College of Technology of the City University of New York.