Amir D. Aczel, Ph.D., is the author of the international bestseller Fermat's Last Theorem, which has been published in twenty-eight languages. A past recipient of a Sloan Foundation grant and a Guggenheim fellowship, Aczel was a visiting scholar at Harvard University from 2005 to 2007 and is currently a research fellow in the history of science at Boston University. He is a regular contributor to Discover magazine.