by Jim Ridley
In an illuminating and aptly titled book, “The Invisible Line,” Daniel J. Sharfstein demonstrates that African-Americans of mixed ancestry have been crossing the boundaries of color and racial identity since the early colonial era. An associate professor of law at Vanderbilt University and an author with a literary flair, Sharfstein documents this persistent racial fluidity by painstakingly reconstructing the history of three families. In a dizzying array of alternating chapters, he presents the personal and racial stories of the Gibsons, the Spencers and the Walls. The result is an astonishingly detailed rendering of the variety and complexity of racial experience in an evolving national culture moving from slavery to segregation to civil rights.