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 this textbook. Originally from Philadelphia, Dr. Campbell received her Ph.D. from Indiana University and completed postdoctoral 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. She was also coauthor with Shawn Farrell on BIOCHEMISTRY, 8th Edition (Cengage Learning), as well as several editions of GENERAL, ORGANIC, AND BIOCHEMISTRY by Bettelheim, Brown, Campbell, Farrell, and Torres.