Peter M. Luthy got his Ph.D. from Cornell University; immediately following that, he was a postdoc of Guido's at Washington University in St. Louis from 2012 to 2015. He is now the chair of the math department at the College of Mount Saint Vincent, a small college in New York City. When he was still in St. Louis, Guido and he talked many times about a course he taught at WashU, year after year, for good freshmen. It was during this time we decided we should write a book based on the course he had designed, and Steve Xiao joined us in the project.
