A really important book bringing together the data from many different scientific disciplines to spell out what (little) we know of humanoid history in the sub-continent. In many ways, a life's work by an important scientist who made important contributions to the study of Indus people and their forerunners.
Kenneth A. R. Kennedy
Books on the Paleoanthropology of South Asian and the Indus Valley by Kenneth A. R. Kennedy
Important essays on the pre-Indus period and after, helping set the wider and still really little known context for this civilization's rise.