Maria J. Kefalas?is a professor at Saint Joseph’s University in Philadelphia and the author or coauthor of three books, including Hollowing Out the Middle, Working-Class Heroes, and Promises I Can Keep. Dr. Kefalas is also an advocate, a philanthropist, a blogger, and the cofounder of the Calliope Joy Foundation, which in 2015 helped fund the nation’s first Leukodystrophy Center of Excellence at the Children’s Hospital of Philadelphia and has supported families receiving treatment for MLD. She lives with her 3 children, Camille, PJ, and Cal, and her dog, Brody, outside Philadelphia. All royalties for the book will be donated to the Cal’s Cupcakes Foundation. Connect with her at mariakefalas.com and on Twitter (@ProfKefalas).