BEFORE WE WERE YOURSFor readers of Orphan Train and The Nightingale comes a ''thought provoking (and) complex tale about two families, two generations apart . . . based on a notorious true life scandal.'' Based on one of America's most notorious real life scandals in which Georgia Tann, director of a Memphis based adoption organization, kidnapped and sold poor children to wealthy families all over the country Lisa Wingate's riveting, wrenching, and ultimately uplifting