Jason Rosenhouse is a Professor of Pure Mathematics at James Madison University. He holds a PhD in Mathematics from Dartmouth College. He is the author or editor of several books on topics ranging from recreational mathematics to evolutionary biology, and he has published more than a dozen research papers on number theory and combinatorics. His books include Taking Sudoku Seriously: The Math behind the World’s Most Popular Pencil Puzzle, which received the 2012 PROSE Award for Popular Science and Popular Mathematics from the Association of American Publishers, and he is the editor of Mathematics Magazine, published by the Mathematical Association of America.