Moshah, there is really no doubt that this is
not a book writing from the perspective of a keris collector or even someone in love with keris. Dunham's expertise is economical anthropology so i also doubt there will be any real mention of the esoteric qualities of the keris, though i do expect there to be mention of the present keris industry. Understanding all aspects of Indonesian culture can only serve to increase our understanding of the keris, so i believe this would be a valuable read even if there were no mention of keris. But since much of her time was spent with metal workers i am fairly confident the keris will receive a good mention here.
Given his mother's work and the fact the Obama spent a fair amount of time in Jawa i would imagine that the President is well aware of the keris. I don't know if it is a particular interest to him or not.