I enjoy feet treatment a lot - I will order one for the hands as well. It feels so relaxing and enjoying to put heated stones between your fingers and toes at the end of the day - stones are of good quality - smooth and black - real basalt rocks! They are small of course, so will be good only for feet, hands, may be face - but in Su-Jock and other systems those parts of a body represent our whole organism. The "book" doesn't worth reading - just enjoy the stones!