I'll just quote from the review of Jpablobr: I think the importance of this book is how it raises awareness on these social constructs that are causing a social decay and drifting us into wrong paths. Racial issues (in terms of white, brown, black) generate lots of tension (rightly so) that lead to many stereotypes and taboos limiting the proper discussion and study of the subject. For example, science has to deal with these racial sensitive issues where justifying the relevance of this differentiations many times mean TROUBLE.

I guess that pretty much captures it. If you've read The Mismeasure of Man by SJ Gould you will probably find this a nice addition, as it covers some of the same material but also gives a broader context outside of the scientific debates.