The late James Stewart received his M.S. from Stanford University and his Ph.D. from the University of Toronto. He conducted research at the University of London and was influenced by the famous mathematician George Polya at Stanford University. Dr. Stewart most recently served as a professor of mathematics at McMaster University, and his research focused on harmonic analysis. Dr. Stewart authored a best-selling calculus textbook series, including CALCULUS, CALCULUS: EARLY TRANSCENDENTALS and CALCULUS: CONCEPTS AND CONTEXTS as well as a series of successful precalculus texts. Troy Day received his M.S. in biology from the University of British Columbia and his Ph.D. in mathematics from Queen's University. His first academic position was at the University of Toronto, before being recruited back to Queen's University as a Canada Research Chair in Mathematical Biology. He is currently a Professor of Mathematics and Statistics and a Professor of Biology. His research group works in areas ranging from applied mathematics to experimental biology. Troy Day is also coauthor of the widely used book A BIOLOGIST'S GUIDE TO MATHEMATICAL MODELING, published by Princeton University Press in 2007. Troy Day received his M.S. in biology from the University of British Columbia and his Ph.D. in mathematics from Queen's University. His first academic position was at the University of Toronto, before being recruited back to Queen's University as a Canada Research Chair in Mathematical Biology. He is currently a Professor of Mathematics and Statistics and a Professor of Biology. His research group works in areas ranging from applied mathematics to experimental biology. Troy Day is also coauthor of the widely used book A BIOLOGIST'S GUIDE TO MATHEMATICAL MODELING, published by Princeton University Press in 2007.