Invisible Founders: How Two Centuries of African American Families Transformed a Plantation into a College by Lynn Rainville, New York, Berghahn Books, 2019, xiii+218 pp., 22 illus., biblio., index. $135.00 (hardcover), ISBN 978-1-78920-231-1; $29.95 (paperback), ISBN 978-1-80073-444-9; $29.95 (ebook), ISBN 978-1-78920-232-8