Sylvia Sellers-García, who writes middle-grade and YA fiction as S.E. Grove, lives north of Boston and teaches history at Boston College. She loves reading maps, exploring historical-fantastical worlds, and finding forgotten things in pockets. She is the author of the YA science-fiction novel, The Waning Age, as well as the New York Times bestselling middle-grade novel, The Glass Sentence—the first book in the Mapmakers trilogy.