This is a sequel to Flying Saucers Have Landed (British Book Center) and may well create even more of a sensation than that book, which sold, by the way, some 80,000 copies in the United States. Scoffers and skeptics will have their field day, but look back at the incredulity that hailed Jules Verne, with the publication of 20,000 Leagues Under the Sea -- and turn to the long list of records of scientific undersea expeditions- and the latest record of atomic underwater submarines. One cannot question Adamski's whole-hearted and almost fanatical sincerity as he records his experience in the two years since he made personal contact with a man from another world, since he first photographed the ""flying saucer"" which brought his visitor. From that point on, up to April of this year, Adamski was in recurrent physical contact with his planetary visitors, was taken by them on various Scout ships (flying saucers to us) to the great space ships which were their equivalent of airplane carriers, and was indoctrinated into the very advanced philosophical concepts of these beings from other planets. Whether one accepts or rejects the facts of this astonishing book, no one can read it without thoughtful weighing of the conclusions that life on the other parts of the universe may conceivably have progressed far beyond the limitations of our troubled earth. For my money, this is infinitely better reading than any science fiction.