One of the most interesting facts about 19th century female inventor Margaret E. Knight, says author Lynn Ng Quezon, winner of the 2023 Grateful American Book Prize, is the fact that she never stopped inventing even during her ninth and final decade of life. “Inventing was part of her,” says Ms. Quezon. Ms. Quezon’s book, “Mattie and the Machine,” is based on the life of Margaret Knight.