With the fields and marshes of Maryland's lower Eastern Shore as a backdrop, Mary Fox brings us a story of two young women-one black, one white-caught up in the tides of social and economic change that threaten to tear apart their community and erode their friendship. But, as Marylanders know, it's in the brackish waters of the Chesapeake and its tidal rivers-the mixture of salt water and fresh-that sustenance is found--