Felice C. Frankel is a research scientist in the Center for Materials Science and Engineering at MIT and the recipient of numerous awards and honors for her work in visual communication. Among her previous books is Envisioning Science: The Design and Craft of the Science Image. Angela H. DePace is an assistant professor in the Department of Systems Biology at Harvard Medical School, where her lab studies the mechanism and evolution of gene regulation. They both live in Boston. Stefan Sagmeister, a leading graphic designer and typographer, has a design firm in New York City.