Laser beams from star cities?

Messages from the stars...? Has the Earth been visited in previous ages by intelligent beings from outer space? Are the visits still continuing? Could laser beams be directed at our planet from space, as a form of attempted communication by another race? Have they formed the strange cup like impressions found on the surface of all the Earth’s continents? These are just some of the many fascinating and thought provoking questions which Robin Collyns asks and attempts to answer, in this original book. His research into extraterrestrial activity has thrown startling new light onto problems which have baffled man for far too long.