My summer reading list is full -- and yet, I'm squeezing this in, anyway. My response to this question was usually something like, "Where are we supposed to sit?" As it turns out, I was right.
From the Amazon.com review: Anyone who's been to a high school or college has noted how students of
the same race seem to stick together. Beverly Daniel Tatum has noticed
it too, and she doesn't think it's so bad. As she explains in this
provocative, though not-altogether-convincing book, these students are
in the process of establishing and affirming their racial identity. As
Tatum sees it, blacks must secure a racial identity free of negative
stereotypes. The challenge to whites, on which she expounds, is to give
up the privilege that their skin color affords and to work actively to
combat injustice in society.