'On the planet Aeran, the original colonists have undergone a drastic change: under the influence of some strange psychic force they have forgotten their identity and created a new culture - an exact reconstruction of the Stone Age society that flourished in Ireland 6,000 years ago.Has some strange racial memory been awakened?Are both cultures the product of a social blueprint implanted throughout the cosmos by a long-vanished race?An absorbing and thought-provoking mystery tinged with mysticism'. Oxford Times.