Susanna S. Epp received her Ph.D. in 1968 from the University of Chicago, taught briefly at Boston University and the University of Illinois at Chicago, and is currently Vincent DePaul Professor of Mathematical Sciences at DePaul University. After initial research in commutative algebra, she became interested in cognitive issues associated with teaching analytical thinking and proof and has published a number of articles and given many talks related to this topic. She has also spoken widely on discrete mathematics and has organized sessions at national meetings on discrete mathematics instruction. In addition to DISCRETE MATHEMATICS WITH APPLICATION, she is co-author of PRECALCULUS AND DISCRETE MATHEMATICS, which was developed as part of the University of Chicago School Mathematics Project. Epp co-organized an international symposium on teaching logical reasoning, sponsored by the Institute for Discrete Mathematics and Theoretical Computer Science (DIMACS), and she was an associate editor of MATHEMATICS MAGAZINE from 1991 to 2001. Long active in the Mathematical Association of America (MAA), she is a co-author of the new set of curricular guidelines for undergraduate mathematics programs: CUPM CURRICULUM GUIDE 2004.