Legacy of the stars

the long version

They came from another universe, peace-loving beings seeking a hospitable planet on which to settle. The world they found seemed ideal for their purpose - a green fertile paradise where they could establish a highly advanced civilization, and pass on their knowledge to the backward inhabitants, light-years behind them in development. But the welcoming land concealed a terrible secret, one that threatened not only the astral visitors, but the very future of the human race!