Many of the mailing lists and web sites documenting the "Melungeon" phenomena cite the book "The Melungeons: The Resurrection of a Proud People. An Untold Story of Ethnic Cleansing in America
By N. Brent Kennedy, with Robyn Vaughan Kennedy."

For those interested in tracing their connections to surnames cited as members of this group, would suggest you read the review/critique of this book originally printed in the National Genealogy Society Quarterly, Vol. 84, No. 2, June 1996 by Virginia Easley DeMarce, Ph.D, which is available online. (see link below)

You might also want to take a look at:
Melungeons: Anatomy of a Myth, by Michael H. Burchett
http://www.terraplanepub.com/century28.htm

For more detailed genetic and historical analysis of concepts of skin color, endogamous groups, perceptions of "racial" traits - check the essays by Frank Sweet at:

http://backintyme.com/Essay040915.htm

We have had much discussion here on this forum in the past on tri-racial isolates, concepts of "mulattos" "Native American admixture" etc.

Just thought I'd point out some of the more recent research, critique and discussion available nowonline.

Denise