I am surprised it is being presented as a 'challenge'. On such *popular* coffee table / library books like, for instance, Peoples of the Stone Age (2,000 CE), Gorus Borluhan clearly states that the only two (or so) bodies found there (unlike in other burial sites) are potential sacrifices, or at least disposed of as such. Not doubting the quality of the new book but do not think the author is bringing up anything new.