Mary K. Campbell was Professor Emeritus of chemistry at Mount Holyoke College, where she taught biochemistry, general chemistry, and physical chemistry, as well as advised undergraduates working on biochemical research projects. Her avid interest in writing led to the publication of many highly successful editions of INTRODUCTION TO GENERAL, ORGANIC, AND BIOCHEMISTRY. She also coauthored BIOCHEMISTRY with Shawn O. Farrell. Originally from Philadelphia, Dr. Campbell received her Ph.D. from Indiana University and completed post-doctoral work in biophysical chemistry at Johns Hopkins University. Her areas of interest included researching the physical chemistry of biomolecules, specifically, spectroscopic studies of protein-nucleic acid interactions.